yeah, it'll be very simple. hardest thing is swapping the brake cables over. if the donor arms have good parking brake assemblies, just swap the cables over as well!
be sure and keep the best bolts, and if your sleeper is as rusty as you say, prepare yourself for some MAJOR HARD BOLTS TO LOOSEN AND REMOVE!!!
you better have some large cheater bars!

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!