Meet the Beast!! 10's on 5k???

That's cool, you need a machinist you trust. I've had so many heads apart, I trust me :) Only thing I can't say is the quality of the SM valves, springs, retainers and keepers. If they let loose, I can't help that.
Well I would think that's kind of the important part the moving parts.. as you know I've been losing my confidence and Speedmaster.. I sent the bracket back for the carburetor that didn't fit oh, I sent the two nitrous plates back that didn't work at all, and you dropped one of their gaskets on the floor and it shattered like a piece of glass LOL.. my machine shop guy was telling me how did check some heads that were perfect 135 spring rate and they came back with 50... They weren't heat-treated so they got soft LOL.