Shaft Rockers with Pushrod oiling?
you will need AMC style lifter's to oil thru the pushrod's,(be it flat tappet of roller) and block off the passage in the head at the block surface, and make sure that your rocker adjuster's are for pushrod oiling too, that is how I set my 408 drag motor up,,,I used crane roller lifter's, Comp Cam's custom pushrod's and Erson roller rocker's, it is adviseable to bush the lifter bore's and have a .030 hole drilled to feed the lifter's this will restrict some of the oil to the top. :)