Dropping a 72 burb?

[benscool1]

Will drop spindles from a 73-87 work in a 72 burb or will I have to get 67-72 drop spindles? The burb is a 3/4 ton but I'm planning on putting a 1/2 ton axle in it so it will have 5-lug pattern on the back, what all will I need to convert the front to 1/2 ton 5-lug setup? I have complete front and rear suspensions from a 73, can I use those parts to convert it to 5-lug, the hubs, rotors, etc.? (i'll still buy some drop spindles of course)