Transmission from the V6 will work from the LWB in the SWB, just need the torque converter with it, and swap the bellhousings. The V6 truck actually has a bigger torque converter which is nice, and if its the right mark in the year it could have a lockup. Transfer case will not work, the V6 truck has a different output shaft, unless you think you can swap the tailshafts/housings.

Otherwise.. you're looking at lots of different stuff that probably won't fit drivetrain wise.. but you can pretty much look at all the body stuff and determin what will fit and what won't.