Maybe search/post on some of the GM 4WD forums or truck forums and find someone who's wanting to go from 2wd to 4wd. Then do an even swap (assuming they're close enough to you to make it worthwhile).

Otherwise, strip a 2WD truck in the wrecking yard to the bare frame and put the stuff under yours. Then sell off your 4WD stuff to recover some of the cost. Might be more costly than finding a complete truck that isn't that great body-wise, though.

By the time you do all that, then drop it, you probably could've bought a nice aftermarket MII IFS.....hmmmmmm


Just my .02