Originally Posted by SKIP WHITE
I really don't know if they are heat treated to this number. According to our head builder the seat material is just as it should be. We have encountered no problems with these heads.
Fair enough. I didn't expect you to know everything there is to know about them, however I'd appreciate it if you could run the questions by your machinist to see if he has any input.
I'd expect the seats to be cast iron and the guides bronze/bronze alloy. The material the heads are made from is A356? Not every shop is equipped w/the instrument to test the heat treat, but your guy might very well be equipped to do just that. But I'd like confirmation if possible.