PRW dropped the rockers from their Catalog.
one of the guys who works for me has a set of the PRW's in his magnum, mid .500 lift cam has over 25k miles on them ,
I have set in a 392 with a Howards .600 lift cam ,and have set on my 428 in my 2014 truck with the Comp cams 274 XFI camshaft
I wouldn't use them in place of T&D's on a serious race engine.
Fact is there is not a lot of aftermarket support in the rocker Arm area, the stock rockers seem to be enough for 90% of the engine builds out there