It's pretty straight forward if you have the parts. Years ago, we converted my '85 T-type to an '86-'87 setup.
The parts I used:
Complete engine ('86-'87)
Engine harness ('86-'87)
ECM ('86-'87)
If I missed anything, then I'm sure that Tommy or Guy can chime in.
I removed the passenger side fender, so that I could swap the engine harness with ease. Everything bolted right in.
Relocate your fuel filter. I put it above the tank. I think I have my old one somewhere. If I can find it, you can have it as I have no use for it anymore.
I might be able to help you out with obtaining the parts needed. Shoot me a PM.