i have this same cam in my well worn 389. 67 gto. performer manifold, 600 holley, th400 2.96 rear, 26" tires. runs well, good throttle response. i don't have the headers on yet so it's not very loud. standing behind the car it sound like a high performance stocker. with my worn out engine it runs about 12" vacuum. lets not talk about fuel mileage. i wear heavy shoes! have fun with it.
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