With regards to your front axle, make sure to get one with the same ratio as the back. As you are new to this, you most likely may not aware of the differences. It would help a bit if you posted the year and current transmission (auto or stick) do we can proper identify the rear axle.
Find a Factory Service Manual for your year. Not a Chiltons or other aftermarket one as they tend to be somewhat less than completely accurate. I found mine on eBay for very little money as the front cover was missing. BFD on a cover, cut the price in half... In fact the seller felt bad and included the AW4 diagnostic FSM as well. Deals are out there, go find one.
Due diligence. As a retired Engineer, I can not stress this enough. The 7P theory of Project Management applies.
For those unfamiliar with the 7P:
Proper
Prior
Planning
Prevents
P#ss
Poor
Performance.
Due diligence. Make sure you have everything you will need on hand prior to starting to ensure an error free result. I would say "Best of Luck" to you but with palnning, luck does not apply. Check your local Pull and Pays wrecking yards for parts. Do not forget the hardware to go along with the assemblies. Not a difficult task as tasks go, just time consuming.
Steamer