RB and a roller Cam

That's why I said a roller on the street has to be carefully chosen. They can last. But also like I said, the lifters should be rebuilt on a regular basis (every two years) and the springs should be either replaced or checked yearly. It's only my opinion but not doing lifter bore bushings for ANY solid roller (big or small block) is a cheap risk I won't take. I've personally seen three complete engine failures that were the result of a lifter coming out of the bore and the oil pressure falling before the engine could be shut down. For $500, risking an $8K or $12K engine by avoiding that process (and avoiding the power) does not make sense to me.