by KF5ZXT » Mon Sep 09, 2013 2:21 pm
It's about time that you chose a vehicle. This won't be cheap, or easy. I'd expect to spend 8k+ or so, but you can do it much cheaper (or much more expensively).
Some questions:
Does your truck have a frame (or is it unibody)?
Does your truck have a steering box, or will one need to be added?
What size tire do you plan to run?
Full width, or narrowed (your stock width)? I assume full width, since you've gone to the trouble of widening your current set up.
Replacing the rear axle? This is important because of bolt patterns and matching up to whichever front you decide to go with.
Leafs, Coils and shocks, coilovers? (listed from cheapest to most expensive)
Is the stock Xterra transfer case driver's side drop, or passenger?
What axle are you thinking of going with? D44, Dana 50, Dana 60? (Balljoint Dana 60's from a Super Duty are muuuuch cheaper than the kingpin 60 I got)
In the meantime, while you gather parts/ideas, you can focus on getting a 4x4 trans, transfer case, and rear driveshaft, which will have the advantage of at least giving you low range.
Read, plan, research, read again, make a spreadsheet, then double your expected cost. Should get you close. If you've got examples of some second gen SAS's that you're mining data from, feel free to share the links.