Diesel, no question.

A 2wd is fine if you plan on keeping it and don't mind getting stuck on wet grass. Being 2wd really hurts resale on a diesel. At least around here it does. You have trouble giving away a 2wd diesel, let alone a 2wd dually.

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax