i know you can got at least 60 over on a 22R, but i don't think it's worth it unless you're having a really hard time finding a good block.

as a rule of thumb on these, punch them out only enough to clean up the cylinder walls. my 20/22 is 40 over because of a deep mystery nick in the #1 cylinder wall when i tore it open.

'79 sport 4x4 longbed <img src="/forums/images/graemlins/smile.gif" alt="" />
20/22R hybrid with EB's OS valves, 268c cam, offy intake, weber 32/36, thorley header, 5 speed swap, 34" LTBs, downey 3" springs, marlin hysteer, 4.88s and locked

'91 4x4 shortbed
22R-E, W56, the dd!