snow plow
Been plowing for 10 yrs with my 92 W250 4x4,5sp NV4500 with a Diamond 8' plow. I had to totally rebuild the rear-end after 135,000 and I think plowing in 4 wheel drive was partly to blame. Added a viscous coupler from Mile Marker in the front drive train this year but have only had one storm to test it so far. I had to retighten the bolts that hold the two halves of the unit together and it looks like some of the silicone (or whatever they put in it) had spun out, but it still works. I'm hoping this will save the jarring to the drivetrain you get when plowing around corners and you hit pavement while in 4wheel drive.
As far as springs and shocks- 2 1/2" Skyjackers on front work really well and their standard shocks. Chrysler supplied air shocks for the front of 90,91 for snow-plowing. They cost $120 each and I think they are still listed.
I've had both the electric hoist and mechanical pump. I liked the electric better. It was faster. You can put a bigger pulley on the engine-driven mechanical pump but then it really whistles when travelling 65-75 down the highway. (without the plow)