Engine Identification

[Robert K.]

Would anyone be able to identification the year/horsepower/cubic inch of an engine with the following number(s):

9 GM 3970020

These numbers are located on the drivers side of the block right next to where the flywheel casting bolts up to the block.......

Thanks for your help...

[Edward M.]

Re: Engine Identification

We need the numbers that are stamped on the front engine pad. The pad is located just forward of the passenger side cylinder head. Look down along the front of the passenger side cylinder head. What numbers are stamped on that pad?

[Joe L.]

Re: Engine Identification

Would anyone be able to identification the year/horsepower/cubic inch of an engine with the following number(s):

9 GM 3970020

These numbers are located on the drivers side of the block right next to where the flywheel casting bolts up to the block.......

Thanks for your help...

Robert-----


GM #3970020 is a block used only for 307 cid engines during the 1970-1973 period. The other information that Ed mentioned will help tie it down further.

[Robert K.]

Re: Engine Identification

Ed,

Thanks for the reply. This is a block casting number (I believe) not a Engine Identification Number. Sorry, I should have said that in my earlier post. I am unable to read the EIN at this time........

Thanks again

[Clem Z.]

Re: Engine Identification

robert any relations in the pittsburgh pa area as i know some people with the same last name,kerestes ?

[Robert K.]

Re: Engine Identification

Hi Clem,

No, none that I am aware of. I'm surprised to find that out - the only other time I had heard of that name was right here in Illinois (and that was only one family (no relation either)!

Bob

[Robert K.]

Re: Engine Identification

Ed,

I looked again but didn't see a pad in the location you mentioned. Could the pad be located in a different place on this block (based on what Joe mentions in his reply - 307 cid).
If you don't think so, I'll need to get more light and open my eyes more!!

Thanks Ed

[Joe L.]

Re: Engine Identification

Ed,

I looked again but didn't see a pad in the location you mentioned. Could the pad be located in a different place on this block (based on what Joe mentions in his reply - 307 cid).
If you don't think so, I'll need to get more light and open my eyes more!!

Thanks Ed

Ed-----


It should be in front of the passenger side cylinder head block deck surface. If not, check by the oil filter or starter mount pad.

[Terry M.]

Re: Engine Identification

It should be in the same place as every other Chevrolet Gen 1 SB. I once owned a 1972 Chevelle with 307, and it had the pad at the passenger side front -- like we are used to.