How much money do you have?

You need a transmission, transfer case, front diff., driveline, wheel hub assemblies (the whole thing!), wheel driveshafts, different frame crossmembers, mounts, brackets, Shift linkages, interior parts, and a bunch of other stuff. You're in it for at least $5K to make the switch using junkyard parts and doing the work entirely yourself and that doesn't include the extra stuff you want like a locker. Then your warranty is toast and you are at high risk of having problems associated with the change that will cost you even more money.

I find it hard to believe you would take a $10K loss on your current truck. If that's the case then it has the same value as my 2000 with 100K miles on it!

Sell it and get what you want.
:rolleyes:
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ChuckH
"Every morning when I wake up I know it's not going to get any better 'til I go back to sleep again!" Al Bundy