Help with Valvesprings and valve float. Noob

OP, before you do anything rocker wise, you may call Mike at B3 racing engines and see what he thinks about putting bushings in the rockers you already have. Other than the needle bearings, there is nothing wrong with those. Press bronze bushings in them, score some new shafts, correct the geometry and don't look back.

That may be cheaper and better than starting over with new rockers. I'm pretty sure he has the tooling to do that. I used to, but that was all stolen by a common criminal and sold to a bunch of production rebuilders in Mexico (true story) who have no idea what all they bought.
FWIW.... I am pretty sure the OP has the PRW PQ rockers. The needles are short length needle bearing assemblies, 1 pressed into each side. So you take them out and you have a recess in each side, with a smaller ID 'step' in between. So you have to bush them with 2 short bushings about .375" long on each side. Or machine that step out in the inside... not worth it IMHO unless you already own a mill. Probably not what most think of when they think re-bushing.... as with one long single bushing.

(I'm gonna re-bush my PQ's with 2 bushings per rocker, but I won't put them in harsh use. I expect to make a jig for them to make sure the 2 bushing are exactly aligned.)

IMHO, the OP is better off with the PRW steel rockers as has been suggested. He has other things to worry about.... (If he does have them rebushed like I described with 2 bushings, I'll suggest some Sleeve Retaining compound in each bushing's bore. The bore ID's vary a bit....)