I'm not that good with estimates but it would be alot. You have the trick flow intake but it won't show much gain with the stock heads. You need a good head to show its potential. If you went with the trick flow heads and a cam to match I'm sure it would be alot.
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85 GT 4bbl roller cam
2 ch. Flowmasters, O/R H-pipe
Performer intake and carb
milodon water pump, FMS 9mm wires, aluminum driveshaft, king cobra clutch
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