I bought a pair of fully cnc`d procomps, they used the victor program, because they are the same head physically. We did change the retainers and keepers tho, springs checked out good. The cnc`d pushrod holes were way bigger than those in the pics, but I still had to work on the holes 3 times to get clearance ! If it weren't for the "rape shipping charges", it would be better to have hughs do it. But, would they clear then ?? The only thing I don`t like about the heads is the spark plug holes aren`t heli coiled, and #7 is right perfectly lined up w/ my steering column, and very close, have to jack engine up or move the steering column to change it. If I ever have that head off, it will at least get a heli coil in that hole ! I had to order 9.400 long pushrods for them w/ the solid roller set up, and have an extra new set if u need some. P S, setting the rocker asemblies up was the biggest pain in the drain for me ! Think I`d use springs next time !