rollers work fine I have pulled them out of cars that had 100k and them still look OK but have seen some that where tore up. but anything can fail I have also seen the bushing crack and fall into pieces.

70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake

best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4