Cam lobe wear. How much is too much

This is the second time this engine has been apart. The first time was due to the oil pump not being tightened up, so it ate some crank bearings. I reinstalled the cam because it looked in excellent shape and mic’d good. Since then, my dad, VeryValiant...has acquired the engine. It ran great with the exception of it wouldn’t idle worth a crap, probably due to the carb being sketchy. He put a new 2X4 intake on it and it somehow got a bit of H2O in it. Waiting on results of the conditions of rods and mains. Can’t help him figure it out cuz I’m in Texas, he’s in Florida....