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I have a small block the only #I find are 3970010 on the deck surface there is 0/40 marking what is it

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At a rough guess I would say that the block has been bored out .040" and that is to let any other machine shops know that it is near the limit for rework

Posted on Apr 24, 2017

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1 Answer

Small block chev 3970010 what is it?


3970010 Small Block V8 1969 302, 4 bolt, Camaro Z28. God-Bless!

Jun 28, 2017 | Cars & Trucks

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What year is this engine? and ci


From this chart - I think you may be misreading the number - 3970010 is possibly the actual number: Which makes the engine pretty old 68-72 350 V8 - 4 bolt main. I included past this number so that you can see that the number you posted doesn't actually exist. And thus my conclusion that the 9 is most likely a 0. Hope this helps. 3970010 350 69 Corvette late 69,4 bolt main 3970010 302 69 Camaro Z/28,Late 69, 4 bolt main 3970010 350 69-79 Truck 2&4 bolt main 3970010 350 69-79 Pass,Chevelle,Camaro,Nova,MonteCarlo 2&4 bolt main 3970010 350 70 Corvette 300,350,370 HP 4 bolt main 3970010 350 71 Corvette 270,330 HP 4 bolt main 3970010 350 72 Corvette 200,255 HP 4 bolt main 3970014 350 69-77 Pass,Chevelle,Camaro, Nova,MonteCarlo 2 or 4 bolt main 3970014 350 69-79 Truck 2 or 4 bolt main 3970014 350 72 Corvette late &undefined;72,200 HP,255HP 4 bolt main 3970020 307 68-73 Pass,Chevelle,Camro, Nova 3970020 307 69-73 Truck 3970024 307 69-73 Pass,Chevelle,Camro, Nova,Truck 3992386 327 68-69 Pass,Chevelle,Camro, Nova,Truck Large Jounal

Oct 13, 2014 | Cars & Trucks

1 Answer

Have a 350 block, 3970010. With 0.10 S stamped on it. What is the S for


The "010" embossing on your small block chevy indicates that the block is 10 percent nickel/iron alloy. These "010" blocks can be of either "2 bolt or 4 bolt" crankshaft main cap variety. The 020 blocks are rare, but preferable to 010 blocks as they are 20 percent nickel to iron and are stronger. The higher nickel content makes for a slight add in weight, but a much stronger block. The "S" I'm not sure of yet.

Aug 06, 2014 | Cars & Trucks

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6970010 small block chevy


If it is 3970010 its a small block engine from a 1968 - 1976 truck.

Aug 03, 2014 | Chevrolet Chevy Cars & Trucks

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WHAT ENGINE IS IN THIS CAR,


I could not find anything that matched these numbers but behind the valve cover on drivers side is the casting number a 3970010 is a small block 350 .

May 02, 2014 | 1972 Chevrolet Nova

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How to find out the CID of a 3970010 engine number identification


what is the vehicle that engine is from ? the engine capacity is usually provided on the vehicle registration documents

Apr 28, 2014 | Chevrolet Cars & Trucks

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Just wondering What my engine is out of. i bought it as a 350 Chev but not sure exactly if its a 350 or not. engine number KO314CMJ casting number 3970010


Hey spoofy, that is a good block casting...Chevy used that from 1969-1979. The Vette, Camaro, Chevelle, Nova, Monte Carlo and Trucks all had this engine. If it's a 4 bolt main, the chances it came out of a Vette are very good. The engine number you give does not cross reference.
I hope this helps.

Sep 16, 2011 | Chevrolet Chevy Cars & Trucks

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