Rocker arms for 408 build
A lot of ways to skin this cat, I would try to use all junk yard stuff, even the pushrods. You will have to check preload but they can be shimmed some. I've even got 1 motor with sft, aftermarket pushrods, shimmed the pedistals with arbor shims for valve clearance. Time consuming but turned it 7000 with 375 open springs, all with stock pedistals and rockers. If you have the cabbage buy hughes or one of the others set ups. A tightly bolted down pedistal is tough to beat.