You could get the Superchips Custom Micro tuner (model 9100)
Runs about $400. This retunes the computer and shift points, pressure points, etc. Even recalibrates the speedometer if you go with the above mentioned gear changes, or tire size changes.
You will have to run 93 octane fuel though to see the most benefits with this.
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5.0, Holley heads, 1.7 Scorp Rockers, Stealth intake, Holley 600 carb, Holley Mech. Fuel pump, MSD 6Digital, MSD distributor, Hotchkis upper/lower rear control arms, FMS B Springs, 3:73 (8.8) rear.
Production # 9,377
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