your stock rear axle is a Corporate 12 bolt 26 spline and you will need 456 gears at least or 477's or 488's...you probably don't want to go any larger as the front axle has to be the same ratio and it is too much for it to handle.

your stock front axle is a Corporate 10 bolt 17 spline ..... if you do this work...you might as well install lockers...unless you don't care.

front ratio has to match rear ratio...so you will need the gears, and all the stuff necessary to set up your 3rd members.

the rear axle is a breeze to replace 3rd members..probably like an hour. but, the front axle has to be practically removed and is a pain to undo everything and work it around the steering linkage.

easiest way is to find some cheep 3rd members or just the housings and then buy all the stuffing separate...then all you have to do is take it all to a gear shop and drop it off for them to do all the dirty work.....this is also ALOT less expensive bill for you and easier for them.... then once you pick up your 3rd members all set up ...they are ready to drop in.