I believe the 7.3L only come with the Quigley 4x4 as I was originally looking for a 7.3 with the SMB 4x4 and they don't seem to exist. I chose 4x system over engine, but I sure do love the 7.3 in my F250.
Cummins would be my choice over 7.3 or 6.0, i love my old 96 diesel pickup. Our budget is in 01-03, now she is set on a EB..... Would prefer swb 4x4 system and the latest upgrades. I think i read a bit on your swb search. If you hear of any....... thanks alot randy