Very true cvalcore...
There are loads of options for our trucks. Including but not limited to:
Wagoneer D44 (80-88 w/o Vacuum Disconnect)
Early Bronco D44 (70-77)
Jeep Rubicon D44 (Not exactly sure on years)
There are also some D30's that could work, but you will just end up swapping it to a D44 eventually anyways...