I'll exclude 20k in gasoline but truth be told that's the first thing I'd spend it on while I'm touring North America in the CRV
If I had to spend it on something 4x4 related I would put it into the Ford.
-New Fourwheel or Phoenix Camper with an Espar diesel powered heater/furnace all on top of an all aluminum Hillboro flatbed..... Well that spends it pretty quick!
or
-Rebuild a 7.3 using the turbo block/rods/pistons, balance the rotating assembly, sleeving all 8 cylinders and add ARP head studs.
-ATS Aurora 3000 wastegated turbo with homebrew intercooler.
-Moose pump/injector pump
-ARB's front and rear with 35spline inners/outers/hubs
-Steering setup upgraded to the point it can be considered powerful
-Buckstop or super rare ARB front bumper.
-Warn 16.5.... Ohhh baby!
-Custom leaf springs to raise the front and loose the stock 4" blocks
Crap blew the budget again