Cam & Timing Set Questions

That is a bad ***.
Cloyes is a great double roller.
Howard's sft or Hughes but get yourself some edm solid lifters, they are direct oiling to the cam lobe. I run a 260-264 in my 470 with 1.6 rockers nets .656-.660 lift. Spring pressure on solid flat tappet are usually the same as a hydraulic roller so they're not super hard on the love and lifter.