New to list - ?'s about a MK1 1.8t swap.

One of the sales guys I work with knows that I'm big into VW's, so the other day he dragged me to his house and told me that as soon as I have a place to put it, I can *have* :) his '81 rocco S. The body is in fair shape, it needs a new right fender and a paint job. The interior is in good shape, just really dirty. The engine is top notch, it started instantly. The only major problem with the car is the electrical system. It is a mess. Too many hands in there messing around. The radiator fan runs non-stop, and I had to start it by shorting the solinoid with a screwdriver.
Long story short, I have a project in front of me. I am planned to strip it down, fix all the rust, sandblast and paint the body. I will reuse the trans, the interior, and the glass, but the wiring is shot. The engine is good, but as long as I have to redo the wiring in the entire car, I suppose that a 1.8t swap wouldn't be that much more dificult, other than the cost of the engine itself.
Basically, I'm looking for guidance. Is this swap pratical...well, thats the wrong word. Is it doable?