I scraped and cleaned the whole pumpkin and found no numbers anywhere. The only thing I could find was on the brake cylinder it says:
"Delco
Moraine Prod
Dayton O USA"

I don't know if that even helps but there it is. I do beleive the guy I bought the rearend from had removed it from a '47-'53 truck but he had bought the truck like that. The leaf spring perches were poorly welded on by someone- not factory and have an extra hole drilled to center the rear in the fender, but I can find no other signs of other spring perches that were on there originally- coil or leaf. Thanks for the help!