How much, if any moddification did you have to do? I'm looking at swapping the same year (90 5-spd to 90 Auto) so the pinouts should be the same. I'm just wondering if any of the functions are different. I just realized (as I'm typing) that the Auto has a speed limiter. Can't have that so maybe one from a 91 5-spd. Any info would be much appreciated,