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The 3970010 number on a 350 was found on the back of your block. Its a base number for that cubic inch motor. Its been there on multiple years of 350. It is also used for all kinds of applications from light cars to heavy duty trucks. all with different compression. There is no way to get compression ratios with that number. Use the number on the front of the block by the head. It will give you year, make and model of the car it was put in and you can track down your compression numbers from there.
What you want to see is the compression reading of all the cylinders be within 15 psi of each other.
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∙ 12y ago
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What is the compression ratio of a 1974 Chevy 350?
8.5 to 1 compression is factory stock.
Is the block numbers on a 67 350 motor 3970010?
3970010 is a 327 in the years from 1967-1969 and 350 from 1976-1979
What is the compression for a stock 1972 Chevy 350?
About 8.5 to 1
What small block Chevy has the 3970010?
350 and a 327
What pistons are stock in a 350 Chevy engine 3970010 year is 1974?
Depending on what the engine was used for, most likely dish top pistons. But flat tops ARE possible.
What size Chevy engine has casting number 3970010?
a 350 or 327 that is the question. A 350 or a 327
What year is a 350 Chevy engine with casting no 3970010 and c5j129384?
casting number 3970010 is a 350 block from 1969 - 1979 but in 1969 302 and 327 have the same casting # and im not to sure about the other #
What year is your 350 with block numbers vo802ckd casting 3970010?
1977
What year is a 350 Chevy engine with casting no 3970010 and 12w297191?
1969
Chevy motor with casting numbers 3970010 a 327 or 350?
That should be a 4 bolt main 350
How can you tell if a motor was stroked 20-30 over is the compression the same 1974-350 corvette what is the stock ratio?
8.5:1 stock
What motor do you have the casting is 3970010 and numbers on front right are c71183775 and the one below is ko629txd?
3970010 can be a 350 two or four bolt block.
