Joe,
Here's a company I found that specializes in the 57-64 Olds and Pontiac rear ends. Maybe it would be worth a call to see what options they have available. IIRC, the Olds axle was the one everyone finally went to after they destroyed the stock unit, but I'll have to dig-out my old NHRA rule book to see if there was a "corporate-only" swap rule in effect back then. I suppose the Ford axles would would work "cosmetically" but for real "style points" an Olds with a big "Question Mark" painted on the back would be hard to beat!
Good Luck with your project. It sounds like FUN!!
https://fabcraftmetalworks.com/