Brent
I am sorry to hear of all the trouble you are having. Your problem may be that you have had two bad sets (poorly designed) of roller rockers. However, others seem to have used the POP and Harlan rockers with no problems. Also it seems like quite a coincidence that both failed for you. This might seem like a stupid suggestion, but I almost made this mistake while assembling my rockers ( the shelby stainless type) even though I was aware of the facts that two of the bolts that hold down the rockers are thinner (smaller diameter) than the rest. These bolts go into the holes that have the
oil passages in them. This allows
oil to come up around the bolt into the rocker shaft to
oil the rockers.
Only a suggestion, seems like you checked everything else to no avail.
Paul