Why is my Imp eating fuel pump pushrods??
I'd be looking carefully for a potential oil splash problem, or lack thereof. Sounds kinda off-the-wall, but could some variance from stock cause the lobe to miss out on the needed oil in that particular spot?? Who remembers what the back of the original cam sprocket looks like, any grooves?? And, along those lines, wasn't there someone (not here) recommending a tiny pinhole in one of the 3/8" oil galley plugs for Torrington or bronze bush sprocket oiling?? Might have even been a chebbie solution, but it might just help you with this one. HTH, Lefty71 (from outta left field on this one).