After some research, I found that the Auburn differential for the Jag rear end (Dana 44) is available in the 30 spline output for around $325-$350. I didn't know about the Eaton Tru Track unit, but now I do?

Now, if I could find the stub axles from and early Jag E series with 30 splines or someone who makes them and some pricing it would be great. If anyone has a source for these items and pricing to share with the board it would be greatly appreciated. Us scratch builders live and die on shared information.....
Thanks,
Bob