So an SBC that served me well for 37 years has decided to devour cams. I had replaced the cam as part of an engine refresh with new lifters and cam. The cam lasted less than 1000 miles and ate a single lobe down to the nub. I used assembly lube, and did a proper break in, so wrote it off to a bad cam (fingers crossed). I flushed the oil pan, and valley and purged the system by spinning the pump with a drill and fresh oil. Then replaced that oil with fresh oil and installed another cam. Swapped oil at 500 miles. At less than 1000 miles, it ate 9 of 16 lobes. Aaaaaaarrrrgg. I ordered a crate engine for it cuz I'm tired of dicking around and want to drive it. It's earned a new engine after being a loyal 37 year driver. Question: What the frick is going on? I'm thinking either: A). The new oils have no zinc, which I'm reading is necessary during break in.... OR ... B). I also replaced the oil pump with the first cam. Maybe I ordered a high flow and its keeping the oil top and emptying the pan? I'm not seeing any other damage to the engine. Cylinder walls look good. I have not pulled the caps to inspect the bearings. FYI- I broke in another engine during this time with regular oil and have zero issues. I'd like to save this engine, but it's got me spooked. Thoughts?