low 13's

[Smokedawg]

Lets see.
Get some Headers for about 200
Underdrive pulleys 80
Electric fan 120
Mass Air ???

Those mods are usually pretty good small power adders. Headers are suppost to be from 5 to 15hp. Underdrive pulleys about 15. Electric Fan will free up to 17HP. Not for sure on the mass air.
Good Luck

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347 Stroker Motor: Balanced, 30lb Bosch Injectors, Cobra Computer, Cobra Transmission, GT40 Ported and Polished Upper and Lower, GT40 Milled Ported and Polished Heads, B303 Cam, BBK 1 5/8 Headers, March Underdrive Pulleys, Electric Fan, Accel Performance Coil, Accel 300+ Racing Wires, NGK Plugs, Ram Air, K&N Filter, 77mm Mass Air Unit, FlowMaster Exhaust w/offroad H-Pipe, Hurst Short Throw Shifter, 3:55 Gears, Ram Clutch, Cross Drilled Rotors, High Tolerant Painted Calipers and Drums.