I kinda feel the same but don't you think the 4bt may be a little under powered to tow with? It would pull the van itself fine but with a 3 speed auto, well you'd have to add extra boost and turn up the fuel. EGT's would run high in the desert climbing some long grades. Too bad a 6bt is too long to fit. But the 4bt is near the top of my list for my next Jeep or Jeep-like toy. Think of the van as the Lunar Lander and the Tow-behind-whatever-it-is as the lunar rover. It would work very well. Oops sorry for the detour.
The way I think the 4bt would work is to use a manual trans like a T98 with the side saddle shifter like Ford used in the old tilt cab C600. Then add an Advance Adapter Ranger OD and you're splittin gears with the Pete's:smiley_drive: Sorry it all makes sense until the word "Tow" is mentioned.