I think it might be tough to do, the boxes are totally different. The newer box would most likely be vacuum operated so you would need all that stuff if you pull the box out of the newer truck.
All of the plenums and ducts would be tough to retrofit into the older truck, not sure how you would accomplish that without supreme fab skills or a lot of half-baked cobbling. The electronics would also be a pain to figure out.
I'd keep the old box in there and get it working properly. Not sure if they are available for trucks but I know there are seal kits to refurbish most cars. Tons of stuff on Ebay - takes time to search for it but it's usually your best bet for the right parts.
The stuff in the engine compartment might work since they are mostly just mechanical though there is a low pressure transducer on newer trucks, can't recall whether it goes into the PCM or not. Newer Sanden-type compressors are swapped in all the time, you just need a bracket to mount to your your engine.
Bouchillon has a bunch of stuff to do this type of thing, maybe give them a call and see if they can steer you in the right direction.
http://www.bouchillonperformance.com/ac_condenser_kitshttp://www.bouchillonperformance.com/ac_switches
