Cam wiped out, what the hell did I do wrong?!?!?

DF your looking at it too deeply, I agree taper on the lobes is what makes the lifters rotate, i don't know of ANY race engine that idles at 2500 rpm , may be a hi-perf rotary? And they do not need to be splashed with oil from a rotating crank. After all thet are in direct contact with oil bleeding from the oil galleries as well as oil from the lifter galley. IMO its either defective cam cores (made in China?) or too much valve spring pressure. Oh i was a cam grinder when Racer Brown was in Sun Valley, Ca.