Thanks for replying guys, this is alot of useful info.

Joe, it is my Legacy and it has 160K on it. The 97 never gave me a problem with overheating, but I guess the Phase1 has caught up to me. Could I get a Phase2 engine and swap the heads with no problem, after planing and replacing with the STI 3 layer head gasket?

Alain, was Evan's motor a DOHC, as I was thinking of doing the same thing, maybe?