My suggestion is for you to use the tutorial on the JE piston website and figure your compression ratio with long math and not an online calculator. You can more easily see what changes make the difference in CR.
Good luck.
No easy answers, huh?? Really it just means I have to get it all torn down so I can start with some known values - I did rebuild it once already, but I looked up the paperwork today and it's not much help as most of the part numbers have changed since 1983 and my memory isn't that precise.
Thanks, I think I'll give up on the shortcuts................
