nice! I actually just put a slant head on my old pk 80 (it came with regular head 2 years ago), and i noticed a difference in how smooth the entire rpm range is. I used 2 head gaskets on that engine, just because my new pk came like that. The old pk has a domed piston, so if I did just use 1 gasket, chances are I could have messed up the piston/ spark plug. It seems like a dog outta the hole, but it runs alot better imo. Thanks Jim, I gotta go fill up on some 93 for this new build!