i just wanted to know what the max honing you can go or do i have to got to a machine shop and get it done? becuase i was planning to put .020" pistons in my block.

 

Honing is done to clean up the cylinder walls from any small imperfections or damange. Boring is done to remove material from the cylinder walls to allow for over-sized pistons. You can hone the walls yourself if you know what you're doing, but it's best to have a qualified machine shop hone or bore the cylinders.