Optimum setup for 302 heads

The nail head does help low lift, as does a larger diameter. But, I think it hurts flow over .300 lift IIRC. May not be as much of a loss on the 302 head because it has a deep throat(keep it clean ;) )and that will help the charge make its way around the head. From what I've seen, most factory type LA heads will lose some flow at mid lift and up using nail heads.