what is everyones opinion on PBM lifters? i bought a new set of PBM RL-925 roller lifters. the previous owner left them at the machine shop to sell because he changed direction. gave $240 for them. i have a new set of PSI springs set at 2.070 height with 265# seat pressure. the cam is .757 lift on both intake and exhaust. am running a set of brodix BB 2 plus cnc heads. two quick fuel 1050`s on an edelbrock. 496 cid. 6550 rpm at wot. the diameter of the roller axle doesn`t appear to be as big as the comp lifters i have with about 100 runs on them. can they stand the pressure or should i keep running the comps? thanks for any replies whether they are positive or negative.