so I got bit hard by this topic this summer. First my old motor had Comp 829s in it forever. 400 passes easy. Got the first set and the body broke down where the axle goes thru. So had a Moparts member here send me 16 relatively new ones that had flat spots on 12 of 16 of the axle. You could feel it with your finger just rolling it. I also was measuring body diameters and they were not all .904 so I sent them back to him and told him what I thought. I know Crane offers a very good lifter that Indy recommended to me and they were around $650-$700. They have roller bearings. My next choice would be bushed Isky red zone. There is a bushed version and a roller bearing version. Birdtracker