I feel a little stupid, I have been to the 60-66 GMC page many times to look at the Spicer 5831 stuff :o .
Thanks for the link!
I didn't really get a good look at the truck. It was rainy and the guy happened to be outside. He started it up, didn't seem to smoke, but thats about it.
I think I will go back and look more closely at the tranny.
Thanks again guys.