I've posted our experiences with those rockers many times. From the moment we put them in service (used several sets early on) they start to grind up the rollers where the pins go thru them.
On my own engine I had a few with as much as .018-.019" clearance by the time I figured out where all the metal on the magnetic drain plug was coming from.
Removed them from several other engines we had them in and same thing, found heavy wear at the pins.
I replaced mine with Crower Enduro rockers and no more issues.........
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73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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