Gm 3970010 block number

These numbers are from the front pad. 21B650536 K04 17 CTL. This block is a 2 bolt main and has the 3970010 cast in the back of the block then up above that is K 9 cast into the block. I looked up the head casting numbers 3998920 and it said they are 72-73 350. The intake valves are big on these heads.

Chevy Small Block - Engine Block Casting Numbers Notes (for below): "High Power" is the maximum rate HP this block was used for, "Low Power" is the lowest rated horsepower RPO engine the block was used in. "Main Caps" is the number of bolts holding the cap. A "two-bolt" main, or a four-bolt main.What year is the Chevy motor with the casting numbers of gm 3970010? it is a 1969-1979 motor it was used in cars, trucks, and vettes ... What year is your 350 with block numbers vo802ckd casting ...Small Block Chevy engine identification. Code identification, Casting Number info. ... but it's a portion of the Small Block Chevy numbers information. The Engine Code page is where this topic is further detailed. ... 3970010: 327--2 : A: 1969-79: 3970010: 350: 185: 370: 2 or 4: car, truck, Vette: 1970-73: 3970014: 350: 200: 300: 2/4:GM p/n 471529 for 12.75" 153 tooth w/ Converter Bolt Pattern of 9.75" or 10.75" (measured across) or GM # 471598 for 14" 168 tooth w/ Converter Bolt Pattern of 10.75" or 11.50". if you have a 10.75" converter pattern, match the flywheel to the starter so you won't have to buy a new starter. "When used separately, women and alcohol can be alot ...GM engine block # 3970010 was used as early as 1968 on some 327ci engines. From 1969-1979 it was a 350ci engine. It could be a 2 or 4 bolt block used in cars, trucks and even corvettes. Casting number 3970010 is a common small block engine casting. It was used in 1968 on the 327 2-bolt engines used in the "A" body, and it was used as a 350 ...markus p best check out the mortec web site for GM casting #'s as the 3970010 block was used for a lot of years. they also used that block for 2 bolt and 4 bolt mains. My 77 as that block # and is a 2 bolt main.

O/t 3973487 k240 gm/4. ... I had a '72 K10 shortbed pickup when I was in high school ten years ago with the original 4-bolt main 3970010 block and a Q-jet. Like 09-05-2008, 07:20 PM ... Randy Brzezinski is a stand up guy (in my excellent business experience with him) so I expect these numbers are valid. The 010 truck block probably has 4-bolt ...The number you are showing on the block is a standard casting number for a 5.7 engine, either a 2 bolt or 4 bolt main block. KenN, The block casting number you posted won't necessarily match the cars VIN. There is another number that would match. As far as the 3970010 number, it is the correct block casting number for your car.What size Chevy engine has casting number 3970010? a 350 or 327 that is the question. A 350 or a 327 ... What is gm block casting number 397010? That block was used from 69-80 to build 302's, 327 ...The numbers you are talking about (010, 020) are only sand core identification numbers. The 010 is a side core for a small block chevy, and it does not guarantee that the block is a 4 bolt or not. Most were 4 bolt blocks, but some 2 bolts were built with 010 side cores, or whatever side core was available.Cross reference GM parts numbers by entering the part number and selecting the make of the car on the Part Number Search page on GMPartsOnline.net. The site cross references the su...

All these are identified here. Quickly, A = Chevelle, F = Camaro, X = Nova. If you're looking at the engine code - this is already known. If you're looking at the casting # information and it mentions 3970010 "A/F/X/Y/B".... basically this means "it's used in everything", whereas if it simply states "Y"... this means Corvette. Decoding small ...See full list on chevygeek.comInfo on gm block 3970010 looking for all origanal. That is just the casting number indicating it might be a 4-bolt main 350. You will need the stamped numbers on the block right in front of the passenger side head. Read full answer. ... Chevy Block Casting Numbers. Use these casting numbers to identify the block you have. ... 283. car & Truck 2 ...Also forgot to mention this block was used for both 327 and 350 cubic in. motors. Became a 350 for 68 up in most Chev. lines. Block usually will have the 10/20 tin nickel content. However, it can come in either a 2 or 4 bolt main configuration. Generally the 010 blocks are good for making perfornance engines.

Iranprouds.

When it comes to understanding the history and specifications of your vehicle, engine block serial numbers are an invaluable resource. These unique identifiers provide important in...Chevy Casting Number identification including Block casting numbers, cylinder head casting numbers, Crankshaft and intake casting numbers. ... 3970010. 69-79. 302/350 ...I have 2 questions about Chevy 350 blocks. I have been looking around and from what I have found is that the 010 020 block is a high nickel high tin block. ... but if the 010 is somewhere else, it denotes the casting number. The entire casting number (3970010) will be behind the left-side head surface, so you can always look there to be …Any of the caps on a stock block other then the 2482 are just a std. grey cast iron cap. Now the 400 4 bolt center caps are nodular iron cap same material as the 2482 350 center caps. Hmm, so all of the 2 bolt caps are gray, as well as #1 and #5 on 4 bolt engines, 350 and 400]. Interesting.Find many great new & used options and get the best deals for 350 CHEVY REMANUFACTURED BLOCK 3970010 at the best online prices at eBay! Free shipping for many products! ... OE/OEM Part Number. 3970010. Engine Size. 5.7L. Manufacturer Part Number. 3970010. UPC. Does not apply. Item description from the seller.

Sep 12, 2013 ... Here's a clip from our How To adjust Valves on your Small Block Chevy DVD. This short clip describes the firing order on a Small or Big ...How to find out the CID of a 3970010 engine number identification. 3970010 shows 68-1969 327 2 bolt and also shows 69-1979 3970010 350 185 370 2. This id # located on drivers side rear engine block stamped on pad. R.S.rear engine block has c-110 on it and R.S. front engine block has 12347 and drivers side of block 371 and 386 …Small Block Chevy Suffix Codes: HR - TBS. GM body designation. All these are identified . Quickly, A = Chevelle, F = Camaro, X = Nova. If you're looking at the engine code - this is already known. If you're looking at the casting # information and it mentions 3970010 "A/F/X/Y/B".... basically this means "it's used in everything", whereas if it ...What is gm casting number 3970010? It's a 4" bore block. Has been used for 302, 327, and 350 engines. ... What is gm block casting number j 1532142 4bolt and what year? Check out this site, http ...May 21, 2020 · I got a freebee block that I am trying to sell but I nned to ID it first. The casting number is 3970010, and the code stamp/suffix is V0709HV. From what I found the casting number indicates it is 1969-79 350ci for a car, truck, or Vette. But then the suffix code indicates it was built July 09, 1965 and is from a 327ci Vette.1 post · Joined 2011. #11 · Jul 7, 2011. Ray J Neal said: Based on the suffix TJA I found it is one of two motors. 1973, 160hp conversion cab truck, or 1979, 165hp forward cab w/ AT. Based on the 3998991 heads (1972/1973) I would think it is the 160HP model. So Pretty much LOW compression motor.Right there was two numbers stamped over each other but that one was the most prevalent. acording to the casting number AND using the stamped suffix of TBC would make that engine a 1970 350 4 bolt main that came out of a truck with 255 HP. Gary. Category: GM. Satisfied Customers:Chevy 350 Details about GM 3970010 Small Block Chevy 350 Bare Block 4 Bolt 4.030 Bore I-20-6 Date. ... Where is the engine ID number on a Chevy small block? The engine ID code stamping is located on a flat pad in front of the passenger side cylinder head (big blocks can be in the same location or above the timing chain cover, with inline …In the 3970010 number, the “010” portion indicates the product is made with a high-nickel, low-ear iron alloy. You’ll see a heads number for additional reference. On the pad are the production date and intended application. …Both the 327 and 350 had the same number 3970010. Reply Like. The following users liked this post: Pop Chevy (11-27-2022) 11-09-2010, 04:13 PM ... The 0010 block was never made by GM as a 327, however, it would be an easy build only requires the later 327 large journal crank and the 327 rods. NOTE: the 0010 was used for the 69 …But let us say it is an original engine according to the numbers and date on the block. I have no idea about the pad ... All i know about the engine is the engine number, date and what the pad says Engine number: 3970010 Engine date: D234 Engine pad: MJ18800 Attached Images Last edited by TheSaint; 03-14-2017 at 04:44 PM. Reply …Re: 3970010 Block Seems to me like the late '70s and '80s blocks had the last 3 digits of the block casting number on the side of the block, don't know why though. 2003 S10, 2.2 auto- the daily driver, currently with a 2"/2" drop and some minor engine bolt-ons

The block is a 3970010 350 and I will go from there. When i dissassembled the engine I found that the engine had been rebuild already with very low miles on it. The inside is a clean as if I just built it, there is NO top edge on the cylinders and the bearings look great. The pistons look like new except for the carbon on top and are stamped .040.

Good morning, Quartz readers! Good morning, Quartz readers! Japan’s lower house votes on a new immigration bill. Opposition parties are protesting the expected passage of prime min...Yea sorry it can be confusing,there is a number on the back of the block inback of the drivers side head.Should read something like 3970010 that is the block number,this you can look up at mortec.com but its a general number.This can tell you what years that type of block was used but no specifics.I know that there was a big shakeup in 1969 where GM changed the structure and put all drivetrain into a division, and from that time forward casting numbers appear to be shared, for example 3970010 blocks appear across Tonawanda, McKinnon and Flint engine plants from mid 1969.Oct 14, 2015 · ericnova72. 22596 posts · Joined 2007. #3 · Oct 14, 2015. The #3970010 block casting number is for a 4.00" bore block, so because of that block casting number and the 4.00" bore that eliminates the chance of it being a 305. You've got a 1974 350, likely a 4-bolt main as it was for HD and Police use and came with a Turbo Hydramatic 400 ...My Questions Are I Have This Block The 3970010 And The Heads Are 3973487 The Block Is A 2 Bolt Main And I Dont Know If Its Worth Rebuilding? And Dont Know If Its A 327 Or 350? ... With The Casting Identification Numbers They List 327 And 350 With The Same Number How Do I Know Witch Is Witch? And The Heads Are The …317 posts · Joined 2005. #1 · Dec 1, 2005. I have a guy that says he has a 69 DZ 302 but the only number he can find on the block is 3970010, is this a 302 casting number?? If so what else can I look for to ensure this is a 302, the guy only wants $500 so if this is a real one I am jumping all over it. Please Help!!!!!The first place we typically look is the casting number on the back of the block. There are dozens of numbers used from 1955 through the ’90s, but there are a few standouts that indicate a performance engine. Common casting numbers for performance engines include 3970010, but ours reads 3956618, another great number to put in your …Chevy 350 Details about GM 3970010 Small Block Chevy 350 Bare Block 4 Bolt 4.030 Bore I-20-6 Date. ... Where is the engine ID number on a Chevy small block? The engine ID code stamping is located on a flat pad in front of the passenger side cylinder head (big blocks can be in the same location or above the timing chain cover, with inline-sixes ...Info on gm block 3970010 looking for all origanal. That is just the casting number indicating it might be a 4-bolt main 350. You will need the stamped numbers on the block right in front of the passenger side head. Read full answer. ... Chevy Block Casting Numbers. Use these casting numbers to identify the block you have. ... 283. car & Truck 2 ...Manufacturer Part Number. 3998993. eBay Product ID (ePID) 1323232817. Product Key Features. Material. Cast Iron. Vintage Part. Yes. Type. Cylinder Head. OE/OEM Part Number. 3998993. Dimensions. Item Weight. ... item 7 Small Block Chevy Cylinder Head Aluminum Bare Straight Plugs SB SBC 327 350 383 Small Block Chevy Cylinder Head Aluminum Bare ...

Solar nails daphne.

Adm marshall corn bids.

Feb 16, 2012 · These numbers are from the front pad. 21B650536 K04 17 CTL. This block is a 2 bolt main and has the 3970010 cast in the back of the block then up above that is K 9 cast into the block. I looked up the head casting numbers 3998920 and it said they are 72-73 350. The intake valves are big on these heads.You need to look at the full 7 digit casting number on the rear of the driver side of the block to find the 3970010 number. Somewhere in that same area is the date code. The casting number, per Slim's post. is not unique to an LT-1 - though an LT-1 is likely to have used that block. ... Chevy Tri Five Forum. 2.5M posts 63.4K members …What year is a 350 Chevy engine with casting no 3970010 and c5j129384? Updated: 9/14/2023. Wiki User. ∙ 15y ago. Best Answer. casting number 3970010 is a 350 block from 1969 - 1979 but in 1969 [email protected]. 9732 posts · Joined 2002. #2 · Mar 15, 2014. Early large journal 4" block. Produced in both two and four bolt mains. Cast in Saginaw, Michigan and machined/assembled in Flint, Mi. Companion block to 3970010.KARISH Discussion starter. 4 posts · Joined 2011. #1 · Aug 28, 2011 (Edited by Moderator) HI, GUYS I RECENTLY BOUGHT A CHEVY 350 cu in WITH BLOCK CASTING#14010207 I DID SOME RESEARCH AND CAME UP WITH THE FOLLOWING: IT'S A 4BOLT MAIN. L82 SERIES 350 cu in. USED FROM 1970-1972.Check Details. GM 3970010 - 4 Bolt Main Block Original Chevy 350 Motor Engine for Sale. Check Details. 434 chevy engine. Check Details. Chevy Small Block Engine Chevrolet Casting Number 3970010 Plus Gearbox. Check Details. $199 GM 3970010 Chevy Engine block TYZ corvette, camero or conv. cab. ← 396 Jeep Wrangler 3d Print Wide Body Kit →.010 as a casting number i.e. 3970010 is found both on the outside left rear of the bell housing boss as the complete casting number and as the number "010" cast into the right side of the block ahead of the starter location. Casting number 3970010 is a very desireable block it is a 4 inch bore used for late 327s, Z28 302s, and heavy duty 350s ...Both the 327 and 350 had the same number 3970010. Reply Like. The following users liked this post: Pop Chevy (11-27-2022) 11-09-2010, 04:13 PM ... The 0010 block was never made by GM as a 327, however, it would be an easy build only requires the later 327 large journal crank and the 327 rods. NOTE: the 0010 was used for the 69 302 by ...What is gm casting number 3970010? It's a 4" bore block. Has been used for 302, 327, and 350 engines. ... What is gm block casting number j 1532142 4bolt and what year? Check out this site, http ...Big Block V8: Date: 1968-1969: Notes: 396, 2 bolt or 4 bolt, Truck: Added to DB: December 25, 2010 (4898 days ago) Loaded in 1 ms. There are ... ….

Have you ever found yourself in a situation where you wanted to unblock a phone number? Whether it’s because of an accidental block or a change of heart, unblocking a phone number ...Decoding/Numbers » 3970010 engine decode help ... 2018, 02:18:23 AM » I acquired what I was told was a 1969 350 that was taken out of a 1956 Chevy Belair in good running condition to be replaced with a 383 and 5 speed. Casting number - clearly 3979910 ... This block is from the 70's. The VIN derivative is probably under the paint on the stamp ...Can anyone tell is this a casting number for a 350 (3870010). I saw a add for a bare block 350 and that was the casting number I was given. I looked for it but could not find any info on it. Save Share. Like. ... 3970010 ,302/350 ,1969-79 ,145-370HP ,car & Truck 2 & 4-Bolt Most commonThe numbers you are talking about (010, 020) are only sand core identification numbers. The 010 is a side core for a small block chevy, and it does not guarantee that the block is a 4 bolt or not. Most were 4 bolt blocks, but some 2 bolts were built with 010 side cores, or whatever side core was available.Today Cousin Mike @landoncustomclassics dropped off a Mystery Small Block Chevy that he's had for a while. We don't know a lot about it, but one things for s...Q&A: Small Block Chevy Casting Numbers 3970010 - Explained. Chevrolet chevy engine 350 camero 3970010 Chevy small block engine chevrolet casting number 3970010 plus gearbox 700r4 casting gearbox chevy chevrolet block engine plus number. $199 gm 3970010 chevy engine block tyz corvette, camero or conv. cab.Mar 11, 2009 · i have a small block 3970010. lg1969 said: It's used on 69' 302 Z/28 4 bolt main. 327 truck and industrial. 350 from 1969 - 1980. The block can be either 2 or 4 bolt main. You have to look at suffix letter in front of the block on the pass. side. Behind the alt. There two or three letters.Q&A: Small Block Chevy Casting Numbers 3970010 - Explained. Chevrolet chevy engine 350 camero 3970010 Chevy small block engine chevrolet casting number 3970010 plus gearbox 700r4 casting gearbox chevy chevrolet block engine plus number. $199 gm 3970010 chevy engine block tyz corvette, camero or conv. cab.GM announced that 39-year-old Dhivya Suryadevara will succeed Chuck Stevens as CFO in September. Here's how much she could make. By clicking "TRY IT", I agree to receive newsletter... Gm 3970010 block number, The block # is 3970010. I ordered this engine new over the parts counter from a Chevy dealer in 1972. I thought it was a 1970 LT1, but the CEC prefix doesn't match up with anything I can find in the books. ... 1972 when I paid Luby Chevrolet in Denver, CO $434.36 for a block with part number 3966921. According to information I have found on …, The block casting number (drivers rear at back of block) is 3970044. No one seems to think this correct, but that is what it is. We do not know what the engine came out of. The number on the passenger side of engine on the pad are 14L192810 then 10219CMA. I believe it is a 350., I've got a 350 SBC that I'm rebuilding but I'm not sure of the year of the block and I need to order my gasket set; I thought I had casting codes in one of my books, but I was wrong. Hoping for some help. . .. . .here's the casting code: GM 3970010 I don't know the engine ID number (I will find out tomorrow when I pull the heads off though)., from Sierra Vista AZ. mortec will tell you it's a 1969-79 350 or a 69 302, based on the casting number. not much help, really. squirrel, Apr 6, 2006. SHARE POST #8., For example, the 43 in 430 signifies that the displacement is 4.3 liters and the third digit is for model control. A 434 and a 432 are both 4.3 litter engines but the different third digits indicates a difference between the two engines. Volvo manufactured this family of engines until 1993., 317 posts · Joined 2005. #1 · Dec 1, 2005. I have a guy that says he has a 69 DZ 302 but the only number he can find on the block is 3970010, is this a 302 casting number?? If so what else can I look for to ensure this is a 302, the guy only wants $500 so if this is a real one I am jumping all over it. Please Help!!!!!, This is the cylinder block in the 57 wagon in my profile photo. I took the pictures during final assembly of the engine. It is important to note that this block is NOT a 4 bolt block. It is a 2 bolt original 327 block, although I understand that 3970010 was also used for 302's and 350's which also have a 4" bore. Driver., I have two with casting numbers 3970010. I've been told by a few people they are good blocks and some machinists say they know there harder by the way they machine. ... Thanks. i ran a Hencho en Mexico 010 Block , had thicker Cylinder Walls than the USA 010 Blocks stock GM Chevy 3.480" Crank Rod Journals turned down 2.000" small …, Re: Engine Casting Block #3970010. 02-12-06 09:07 PM - Post# 873994. In response to joeysworld. The difference is the suffix code on the block. Could be a 145 HP 350 from a 1975 caprice. Could be a DZ 302. The difference is the code on the front of the passenger side. Just above where the water pump bolts., Are you looking to improve your English speaking skills and speak fluently? Speaking good English fluently is a valuable skill that can open up numerous opportunities in both perso..., In today’s digital age, online advertisements have become an integral part of our browsing experience. However, with the increasing number of ads bombarding our screens, many users..., Small Block Chevy Suffix Codes: HR - TBS. GM body designation. All these are identified . Quickly, A = Chevelle, F = Camaro, X = Nova. If you're looking at the engine code - this is already known. If you're looking at the casting # information and it mentions 3970010 "A/F/X/Y/B".... basically this means "it's used in everything", whereas if it ..., FYI...not all 3970010 castings are high nickel. A "010" cast in the area behind the timing gear would denote a high nickel block. A "020" cast in the same area would designate the casting as high tin content., All these are identified here. Quickly, A = Chevelle, F = Camaro, X = Nova. If you're looking at the engine code - this is already known. If you're looking at the casting # information and it mentions 3970010 "A/F/X/Y/B".... basically this means "it's used in everything", whereas if it simply states "Y"... this means Corvette. Decoding small ..., There is no way a 3970010 could have came in a VanNuys 12B built 69 Camaro. the 3970010 V0926DZ stamped block is most likely from later 69 and that casting date is probably I 18 9. Sometimes the 9's look like 8's. Team Camaro Gold Member #14. 1969 Camaro RS/SS Azure Turquoise., I have a 350 4 bolt main block with casting number 3970010. can you tell me the year and the vehicle it originally came. Expert's Assistant chat. Customer: ... I need to know what these numbers on chevy block belong to C. 10.8.2020. RobertW710. Master technition. 452 Satisfied Customers. Need to know if my 350 is internal or external balanced ..., 1704 posts · Joined 2006. #1 · Jul 26, 2007. Hi friends, well I start this dilemma with this engine small block 3970020. In Mortec say with is a 307", but... the crankshaft is a 350" and the cilinders have 3.91", is very rare, this engine are installed in Camaro 1970 RS but I dude is this 307 or 350? I have many pictures of the engine for you ..., GM engine block # 3970010 was used as early as 1968 on some 327ci engines. From 1969-1979 it was a 350ci engine. ... Gm casting number 3970010 but what is the A81 on the passenger side? A81 should ..., A 509 casting 400 block has the numbers "509" cast into the sides of the block in big letters -- like 1" tall. The 350 block will not and the 509 under the TC cover doesn't mean its a 400 block or a "509" casting. the suffix code you give TML is for a 1974 Chevrolet Van 350 engine. cast 3970010., Sep 7, 2020 · Kdemmons Discussion starter. 4 posts · Joined 2020. #1 · Sep 7, 2020. I have a Chevy engine with the casting number 3970010 from I can see they use this for a couple of engines the VIN is v0610chf I can decode most of it except for the hf at the end can anybody help me out. Like., 1 post · Joined 2008. #1 · Aug 3, 2008. I have recently aquired a chevy small block and I'm having trouble finding out exactly what it is. I have found Four numbers. 3970010 along with "hecho en mexico" on the back drivers side. 254 on the back passenger side. 010 on the drivers side in front of the oil filter. and the engine code is "MK01800.", I know that there was a big shakeup in 1969 where GM changed the structure and put all drivetrain into a division, and from that time forward casting numbers appear to be shared, for example 3970010 blocks appear across Tonawanda, McKinnon and Flint engine plants from mid 1969., 1968 3970010 327 2 bolt. This is a side post from my original post about my motor. Everybody knows the 010 block was used on 69 to 79 350s. Everybody do some research and let me know what you find on a rare 010 block 327 2 bolt built in 68 what they were in and maybe how many were produced if any. Keep and open mind and search more than one site., Yes, one of the most durable low perf block and head combos GM ever made. Reply Like 05-03-2010, 02:32 PM #3 jim lockwood ... To 4 bolt main GM 3970010. Subscribe Reply Subscribe . Tags. 338882, 3970010, 41, 42, bolt, chevy, corvette, engine, gm, gm3970010, good, head, heads, main, remanufactured ..., Find many great new & used options and get the best deals for SBC 350 V8 ENGINE BLOCK 3970010 4 BOLT MAIN SMALL BLOCK CHEVY FOR PARTS at the best online prices at eBay! Free shipping for many products! ... Manufacturer Part Number. 3970010. Fuel Type. Gasoline. Item description from the seller. Seller assumes all responsibility for this listing., 3932386 casting #. found a 3932386 block in a crate in an abondened machine shop that my brother bought. the crate was tagged 4 bolt chevy 302. however the book i have says that this casting # is a 68-74,327-350 HI-PREF. i know that it would work fine to build a 302 out of,but i was hoping it was a real 302 block. does anyone have any books ..., 69 Camaro Z/28 302 DZ complete engine. This is the real deal, black casting # 3970010 casting date E 14 9 (May 14, 1969), engine stamp code V0527DZ (May 27)., The date code is What cubic in is a gm block casting 3970010 Where is the serial number on a ford engine block by Eagle1337 - Wednesday November 10 2010 05 32 PM chapter. ENGINE SERIAL NUMBER., cobalt327. 21011 posts · Joined 2009. #2 · Sep 9, 2010 (Edited) Thaat would be 3970020. The problem will be in finding 350 compression height pistons w/a 3.905" piston diameter. You could you use a 0.030" over 307 piston with a 5.565" 400 connecting rod on the 3.48" 350 crank to make a SBC 334. The quench will require the block to be decked ..., For example, you have an engine with the stamping number "3970010" and a " CMJ " suffix code. The " CMJ " suffix" corresponds to a 1974-1980 t4OO police and automatic trans appl engine. ... Engine Block Casting Day Number. The Chevy engine block identification is a specific number that indicates the casting characteristics and ..., from Lakeville MN. According to a book i have "How to Build Vintage Hot Rod V-8 Engines" Page 72 "the small-block Chevrolet 350-ci engine blocks with a casting number of 3970010 are some of the best. you will find the digits "010" and "020" behind the camshaft gear at the front of the engine block. the "010" represents 1 percent additional tin ..., Are you trying to identify your small-block Chevy engine's head? Check the casting number in this article with the free lookup. ... 3970010: 68-76: ... Can’t find ..., 3970010 is a rugged block used mostly for 350's for mamy years from trucks to the original 1970s LT1's. As a 350 or 302 many, but not all, have 4 bolt center mains. It also was used for large journal 302s and 327's. I'm not going to comment to the meaning of 010 and 020 on the block as relating to the presence of nickel or not in the casting.