The first set I had would just not hold oil. Had to set the rockers about ever hour of operation. Got a new set and they worked well for a few thousand miles, now they are failing. The guy that owns the shop I dyno'd the engine at, told me they quit using them as they had the same trouble.
Anyone know if the retro fit roller lifters sold by Comp are made in the same factory that makes the Lunati, Johnson or crower retro fit roller lifters? Any suggestions on a brand that is known not to be made by the same folks who make the Comp stuff?

For the engine builders,
If I replace the hydraulic rollers with solid rollers would I have to get a solid roller camshaft or could I use the hydraulic roller shaft already in the engine? I have the springs, keepers etc that will handle a more aggressive cam/lifter combo. Just don't know about the shaft. Can't see why not but I've been wrong many times before.