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I ran a 750 DP, 538 lift 308 dir cam and passed the state sniffer test 4 years running without tuning each time. I would need to know whats in your engine, carb, cam, intake, haeders, etc. bigjimlll is right start by getting a vacume gauge. I learned alot of tricks from some big name oldschool racers. Racecar spelled backwards is (Racecar). I'm sure we can help you.
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