I took some pics of the cleanup process if anyone is interested.
http://captaincheeto.com/pictures/64-gmc/oilpan/I'll update this as things progress.
If I have the time I want to clean up the underside of the pan and put a fresh coat of paint on it. But since this truck is my driver, if I get the chance to put the pan back on before I find the time it won't get done.