Underdrive pulleys are a good idea in my book, but since you have a fox body with a 85amp alternator, charging could be a problem, but my dad has had no problems with his. I went from a 14.96 at 91 to a 14.6 at 94 with just pulleys, though my dad only saw about .12 of a second and 1.5mph.
If you put the battery in the trunk and plan to run at the track, you must include a shut off switch that is accessible from the rear of the car on the outside- just keep this in mind. Have you bumped your timing? There a bunch of little things I can tell you, but my batteries are about dead in my laptop so I'll post them later.
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