Actually guys im not talking about changing to hardened seats. Im talking about having to have the seats modified to run a bigger cam than stock. Not about modifying the seats to run modern gasoline. Misunderstanding I think. Kid I think you were on the right track at the end of your post. I don't know if they think the pistons will hit the valves like lid said ie what. The .440 cam from compcams should not be near big enough to do that. I've built v8s with over 9:1 a .500 lift and I've never had to have the guides modified in anyway. They must think the slant has 10:1 comp and im using a .600 or bigger lift cam. I have no idea just wanted to know if anyone has had to do this?
