I think I'll let someone with a little more hands-on experience with this swap open up that can of worms. To the best of my limited knowledge of the situation, there are some issues concerning the diameter and width of brake drums, clearance between the spring leaves and the backing plates, and some issues with parking brake linkage if the donor brake system has the parking brake incorporated into the rear wheels rather that at the back of the transmission. It's definitely not a bolt-on swap.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!