best camshaft brand
Saw a video recently, may have already been mentioned, that showed many of the lifter issues were two-fold. One was the lifter crown was insufficient or missing which caused the lifter to not rotate. The other issue, to a lesser degree, was the cam lobe did not have the correct taper. The video talked about how he went through lots of lifters to find a set that was consistent. Think this is where having the old lifters resurfaced would be the ticket.