I can't find the info on this piston that was reused in my engine that was rebuilt about 8 years ago. I do remember checking the part # at the time and I seem to recall that it was the factory standard bore piston 11:1 for the 302. Can anybody verify it from this poor pic? Thanks.
Last edited by clm69z28; May 17th, 10 at 11:15 PM.
Might take the number to an older GM parts counter and ask one of the older Parts people there to look in the older parts books.
Or get a better picture of the number or write the number here and maybe one of the other members could look it up in their catalog.
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Part of my confusion on the part # was ths issue that you point out. The Chevy part # and the piston part # are different and that lead me to initially believe I had a different piston but I remember somehow tying the two together. Is that a TRW part #??
I kept looking at the faint #'s in the picture and they didn't appear to be 3946876-that's because they are 3927172. Can you shed any light on this? Thanks.
I believe the forging number was the same for the 11:1 and the 12.5:1 piston. The 11:1 piston is what was offered in the 302. The part number is different for the two pistons, but the forging number was the same. Since it's a solid dome, heavy, you can cut the 12.5 dome down to make an 11:1 piston. The pic you have appears to be the 11:1 piston to me.