Yeah but he could end up doing what I did, run the 318 until it breaks and then put in a 340 short block. Cosmetic gaskets weep water when cold, not cool for everybody.
Milling .060 is too much imo, best to stay with .030 max. Why limit your options later on? The "right way" is to replace those low compression pistons with higher compression kb pistons, wasn't an option in the old days.
