If anyone is looking for a Dana 44/9" combo out of a 69 Ford pickup let me know, I bought the NP435 trans for my 69 Bronco from him and he is about to junk the truck.

Personally a Dana 44 is PLENTY strong for a Xterra, there are plenty of Early Broncos that run 35" tires and up without problems. These trucks also have MUCH more power than an X does, extremely low gearing is common(I have a 6:69 first gear) so IMO a Dana 60 is overkill for the X.