Here are the specs to the best of my knowledge:
-4" Dia. 1/2" wall tubes (Normal '05-'16 Dana 60s are 3.75" Dia. 1/2" wall, Pre-'99 Dana 60s are 3.125" Dia. 1/2" wall)
-Wider Ball joint spread and bigger ball joints (Normal '05-'16 Dana 60s already have wider ball joint spacing than earlier...