4.88 gears +31s + no overdrive = suckage.
Because that's about all that's needed. The 8.8 will require more monetary output, more energy, more time, etc. If his goal is to get this thing on the road again and soon, an XJ Dana 35 is a good choice. (and I can't believe I'm actually saying that :ack: but it's true)
Remind me, what's wrong with the current 35?