[chiphead]

Typically pistons are available in .030,.040 and .060 larger diameter than stock bore size. You may be able to find a .020" larger diameter pistons, but the challenge is finding a common ring pack to fit the pistons. the piston rings are also typically only in 30, 40 and 60 over sizes as well.

Also, which cylinder heads do you have and what kind of gas do you want to run? Typically we suggest using dished pistons to reduce the compression to 10:1 or lower to run on pump gas. This is often needed on the '72-earlier engines with high compression heads.

I'd also suggest using some decent forged rods, as they're cheap insurance against rod and rod bearing failure. The stock rods can be prone to failure when they're diassembled or run pretty hard in a hot combo.