Ah, to remember the hours upon days of cruising with a screamin' Jimmy behind my head.
Still in use, although being phased out by the C-15 powered LVSR, I present the USMC LVS:
Now slap on some quick and dirty armor, change out the rear unit for a 16 (5th wheel) and add an 870 (semi trailer) and that's where I spent quite a few convoys on deployment. Standard fare for crossing the Afghan desert is to bungee a bed roll on the bottom of the dash, buckle your Kevlar, and hold on! Leaf spung and flying across the desert whoops only get better with speed until she gets some air under those tires and landing isn't pretty.
Very reliable power plant that sounds even nastier when the muffler falls off and it's straight out of the 8v92TA's turbo. Annoying and deafening, but nasty.