HALF A DEUCE AND MORE
OK, - IF - we can trust measurements taken off a model to be correct. (not) Then frame rail spacing on the half-track is wider and slightly taller than that of the GMC Deuce.
If these measurements hold true for the real vehicles that would mean: Cut the GMC frame just ahead of the driver's seat and cut the half-track frame just behind the driver's seat. You would now have two sectioned frames that would slip (telescope) one into the other to overlap, splice and weld together.
All engine, tranny, brake, clutch, steering, front wheel drive components AND the armored front body would remain mounted to their original half-track frame. At the same time the transfer case, rear driveshafts, suspension, axles and rear load box would still retain their original GMC frame mountings.
Assuming two battle damaged vehicles you could cut both of them while still fully assembled, slide them together until the correct cab to load box distance was achieved, true everything up one final time, throw in some scrap frame parts and a good welder could have a complete new vehicle back together in no time at all.
All that remains then is to have that same pro welder create a custom short driveshaft to go between the transmission and the transfer case. While he's busy doing that, reconnect the fuel line, the rear hydraulic brake line and the rear wiring.
In about 18 hours of steady labor a GOOD five man heavy maintenance shop could have a brand new vehicle for the General, ready to run.
Easy-Piezy Sheldon! Ba-zinga
I'm trying to get the shop crew to work overtime right now!