Rudimentary valve clearance question.

How deep are the valve notches? My 383 (piston .014 in the hole) didn't have enough valve clearance with a 292-.509 cam. only had about .070. That was with a steel shim head gasket (.018). I had flat top pistons without valve notches. With the Eddy heads though, who knows. Ya gotta put a cam of some kind in there and measure what you got and go from there.