340 compression ratio

4spdragtop said

If the engines out cant you pull one piston and rod? Get your compression height from piston and cc the valve reliefs while its out.[/QUOTE
Yes

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70aarcuda said

alot of pistons will have the part number stamp on the top of it....

but unless you know the deck height on the pistons..and cc on the heads...plus the head gasket cc ...you are guessing at the compression ratio.

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yeah that’s what I was trying to figure. I was gonna cc the heads, choose a gasket or two to figure it but wasn’t sure what to do about how to determine the info I needed for the piston part of the equation since I don’t have the info on the piston. Wasn’t sure if I could cc the piston in the bore at TDC and get anywhere with that.