the shop that is doing my head work is the same shop that built an high performance big block a friend of mine had built for his gto. as far as i know the head has never been resurfaced. im sure that they will advise me if its under the min thickness but i will be sure to ask when i pick it up. there waiting on some parts right now it should be ready the first part of next week. in the mean time im cleaning up parts and getting old gaskets removed and stuff like that.

what size tap and die are required for chasing the head bolts and holes?