The TFS Stage 2 cam is a nice cam. Some folks don't have to worry about piston to valve clearance. But if you do, just retard the cam 4 degrees and there ya go. But then again, I'm running the track heat heads so.... it might work with stockers but i don't know. The Ford E303 cam is a nice one too... I built a 306 with worked stock heads and ran the Z303 and it worked nicely.