340 compression ratio

Steve, My buddy who builds engines hasn't been home and I don't have a phone number…I stop in when I see his shop door open as he's close by. I haven't forgot about you and will get a picture and an answer for you as soon as I can. I might have it wrong about removing the head too. Maybe you measure with the head on and the piston full down and then again with the piston full up…I really don't know, but will find out what Al does!