Changing crankshaft bearings with the engine in the car.

I haven’t heard a lot about the cam bearings, but I do know that a considerable number of the cams produced weren’t adequately heat treated. I have seen an early 5.9 magnum before that had the cam bearings pretty well chewed up in it before. The cam was showing signs of delaminating on the lobes, so it may have had something to do with it.