[Carnut427]

From my experience, the cam manufacturers usually set the cams up so they'll fit. From my experience, the time when things get tight on an FE is on the intake, as the intake is opening faster than the piston is going down. I've only run Comp cams, and it appears they design the cam so that it'll have enough clearance. You should definitely check both intake & exhaust valve-to-piston clearance whenever you change a cam, but from what I've seen you won't have a problem. I haven't seen an exhaust valve come anywhere near the piston to bother actually measuring the clay. My current cam has a .675 lift (solid roller).

Dan