I'm with 1BAD89, what about an electric fan. That with the additon of a k&n and msd on my stock GT picked me up 3/10ths in the 1/8th. I can't remember the mph increase, but I attribute most of the gain from the free hp from the fan. You've got the all the right parts, what about weight reduction? What kind of wheels are you running, the factory ones are very heavy compared to some of the aftermarket welds and centerline wheels. Verts are noisy anyway and I know it's a job, but remove all the sound dampening material. Take the spare tire and jack out if you haven't already. Every little bit helps.
Wish I could help more.
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91 single turbo vert
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