67Steve you gotta have coil bind or something causing them to break.
yeah something's up or wrong, I would guess... I've ran them for years in a variety of race & street engines with solid, hydr. & full on radical race rollers both hydr. & solid configurations, some on combos up-to 1800hp Blown Inj. Alky & spun into the 8500rpm with near 0.800" gross valve lift range, with 1.6:1-1.7:1 ratios & I never had any Crane Super Gold Roller Rockers break/failures, as long as you have adequate oil & the proper set-up &/or clearances... I've had adjuster screws break & bend a few pushrods etc. but never a Rocker Break/failure...
do you want some spare gold crane rockers?
you will brake them with a roller cam.
ask me how I know broke 6 before I went to Harland sharp
Just out of curiosity, my morbid brain needs info...LOL... what happened to make them fail ??
that's the bigger question... I've had the roller trunnions fail on Harland Sharp rockers from a defect too, little roller pins on the shaft grind up/disintegrate & go thru the motor {most was caught in the System One/O-berg filter screen fortunately} & screwed everything up on the top end too, so any rocker even a high $$$ set of roller rocker "could possibly fail", in some way or other... But actually "
breaking" a shaft style rocker, let alone 6 of them, you had to have something that was "
really wrong" coil bind or the camshaft grenade or rocker stuck on the shaft, because of lack of oil or something catastrophic, to cause a failure like that, with any shaft style rocker....
Q; did you do a bunch of grinding/machining on them for valve spring clearances ??
possibly weakening them in a critical fulcrum area near the shaft
