4 wheel drive conversion

[RedRamAndy]

Hello all, I'm betting this topic has been touched upon before, but I wanted to start this thread as I couldn't find much when I searched. A little background: I have a D250 Getrag '89 that has appeared to have lived a very lightly used life. It has a Dana 70 with a 3.54 sure-grip rear and very little rust. I love the truck, but it is almost helpless in very light snow or loose gravel. I had a gas fired W250 (4WD) that I sold because of rust and excessive gas hunger. My job with the state of Missouri requires that I get to a particular maintenance building to drive a snowplow in snow events. This is a huge responsibility that I can't miss. We just got a snow that proved to challenge my little R/T Neon's limits. I know that this car isn't intended for deep snow use, but it is my economy cruiser. I'm really missing my old invincible Power Ram and would like to turn my beloved Diesel into a snow monster. Around here, the 4x4's are very rusty and usually beat. My 2wd is in awesome shape, so I more interested in converting it than simply buying a 4x4. Has anyone attempted this? It doesn't seem too hard to me at all. I am starting a list of parts I need to source and trying to get a grip with the cost involved. I'm open for any ideas and advice from those who have already been down this road. I need help! ;-) Thanks. (maybe I need mental help?)