Buddy did a universal under-dash kit in his M923a2 for $500 complete and loves it. Compact and works great. Available in 24v. I don’t like the Humvee evaporator because you essentially lose your back window and center seat. Can’t post links, but I just checked eBay and there is a universal 24v kit for $519 that includes compressor, evaporator, condenser w/fan, receiver/dryer, and all hoses and fittings as well. My 8.3L bracket is under $200, so as Simp said, you would be under $1k and all new. Spend the $1,800 left over on diesel fuel.
My 8.3L bracket kit below. Also shown w/130A alternator. Tell the kit supplier you need an 8 groove pulley on the compressor.