My e7 heads have beehive springs and stock rockers, if I bought a set of gt40's could I just swap them over and run em? My second question is about ptv clearance: I have flat top pistons w reliefs do y'all think I would have clearance issues w the gt40's or are the valves close enough in size as e7 that I should be safe? I realize that you're supposed to "clay it up" first but anyways what do y'all think?