OK, I had a similar altenator built for my 95 Maristar. I have the LT 1 though. Went from 50 amp alt to 105 amp. The wiring all matched my factory unit....
However, the issue I had and you will probably face is the case was a bigger diameter than the lower output case. I had to modify my brackets to hold the larger alt. It all looks factory now, but the mounting was a test of fabrication skills.
I did this 2 summers ago and do not regret it one bit.