Ed I actually have wear on the cam bushing, on the bushing that is inside the engine, not in the one that is on the cam cover. It wore but was slight, and the result was like if I had drilled the top of the bushing with a drill a size bigger 1mm deep, the cam is still being well supported there and without play... but it was indeed a failure I think....it was a big surprise when I found the crank spiral full of bronze powder.

Jorge