jonathon
1/2 ton status
www.TheRangerStation.com
There's guys over there that could talk you through the whole thing...if you don't end up wanting a 5.0L swap as well!
A 5.0 would be pretty sweet.. I'm registered there but haven't done anything but a couple posts back when my electric t-case shifter was fubar'd(I fixed it, but have a spare manual t-case for later with the rarer A4OD shifter assembly).
I'd love to do a high pinion d44 front and 9" rear... figure it would be pretty sweet.

My 2.9 runs good, and the trany's are the same(clutch on the 4.0 is a 10" versus the 8" on the 2.9, but from what I read a clutch and flywheel from a 4.0 will work on the 2.9).