Jim, why would anyone hot tank an engine without disassembling it or rebuilding it? It did not happen.

I have some Pontiac photos of red and polished aluminum OHC engines. They never delivered one to the customer that way. I have Pontiac photos of engines in "Pontiac Metallic Blue" and have other photos of untouched cars with a distinctly more blue non-metallic paint.

There is much that is not known, but too much that is assumed to be true just because someone claimed it to be so. As time goes by, original details like this will disappear into history. Would anyone like to contribute their "before" info to feed this discussion?