i wouldn't use the LT motor, junk in my opinion. go with anything 98 and newer, LS. do some google research, there are many companys that provide complete harness/computer/tuner set-ups for this swap. you could get a complete harness from a junkyard, but you'd just end up cutting and hacking away all the things you don't need...not a very clean install.

good luck! and post the progress if you end up doing it!