Another 340 J & O head thread (what do i have?)

^^^^What he said regarding the compression. They kinda look like the TRW 2316 pistons to me, which should be a few thousandths out of the hole at TDC...but, I'm probably wrong.

This is courtesy of krazykuda; pulled from the tech archive

http://www.forabodiesonly.com/mopar/showthread.php?t=278215

If you have a few precision measurement tools, you can nail down your true compression ratio...if you want...