A roller cam setup is way expensive. A hydraulic flat tappet will work fine. The procomp heads will be fine they'll just have a very unfinished appearance. You'll need to smooth out the runners and combustion chambers, especially the bowl and seat area. If this disinterests you, use a better head. Don't take stroke out, add stroke if possible. 350cid 190-200cc, 383 210+. Have fun!