The Vaccuum diagram should be on the hood. If not, I'm sure someone here has a FSM for that year, or check out a Chilton's manual at your local library.
If you want to REALLLY have fun with that 2-dr, save some $$$, buy a turbo motor/wiring harness/SMEC, and do a turbo swap. The motors in these cars are a breeze to drop out and replace. I have an '89 Shadow 4-dr I am working on(HG issue as well), and have a 2.5L motor from my old car that I'm "blowing" and making my own turbo motor(hopefully).
If you want to unleash that TBI beast a bit, get an A523 5-spd and ditch the slushbox. I have one in my Shadow, and with the 2.2L motor, it will dust most ricers before they know what hit them....lol.:thumb: I had this same trans in my '89 Acclaim, and with the 2.5L, I could roast most Hondumbs right off the line.