Hey guys, sorry I've been out a while... took the crank to have it polished and heads redone. Question: How much ware can my calendars have before I need to bore 20 over? Stock is 3.91 and mine measure about 0.002 under (so 2 to 3 thousands ware). My son is trying to save wherever he can and doesn't want to buy new pistons unless he has to. I can't find a chart or guideline on this specification so I appreciate the help!!
