Wow.
I'd just say screw it, and trade the '01 in on a '02+ SC model.
Otherwise, you will lose so much $ doing a swap its not even funny.
And, if you are in an accident and total it, the check won't even cover the cost of the mod, let alone the cost of your truck.
On the other hand...if you HAVE all that $ laying around burning a hole in your pocket...and you want to end up with a supercharged '01, you'd need to do a BL and a few other mods to make room for the taller profile ('02 hood lines are about 1.75" taller than the '01's, etc...)....harnesses, plumbing, ecu, etc.
It might be cheaper to take the new '02, and mount the front clip off the '01 onto it, using a Shrock front bumper (etc) to eliminate the lower facia matching nightmares, etc...and allow the lower '01 components to run more smoothly into the taller '02 lines, etc.

_________________________
- TJ
2001 Xterra '03 VG33, SE 5 spd, 305/70/16's, Revolvers, UBSkidderz, Doubled AAL's, 3"SL/2"BL, winch/bumpers, skids, sliders, OBA, Snorkel, pine stripes....
Friends don't let friends drive stock.
http://www.gifsoup.com/view/501230/tj-tackling-crawlers-ridge-o.gif