Performance Quotient shaft mounted roller rockers 

Yep. Not so much because it broke, more so because the shafts, all of them were showing severe wear.

@@irasupertrucker that is an interesting failure, you think there was a lack of lubrication to the needle bearings? My valve spring pressures will be a little less than yours, approx 400# open. How long did yours last before the failures?

@@chestrockwell8328 they had less than 400 I would say.