Got in a "new" set of heads for an engine build for a friend....sbc 350 profiler 195's. I only pulled 2 valves out of each head, this one was the worse but there was chatter marks on every seat... my machine shop guy said the guides were too tight too but I didn't really feel what he was talking about, I could feel very very minor side to side clearance that felt normal to me, but who am I to question him.......the valve seats speak for themselves.....you can catch a edge of your fingernail on them....is this normal from profiler? I thought they were a decent head? do they save the crap heads for people that get the heads pre-assembled assuming they aren't going to take them apart and look at them? either way -beware....