If you've been followingCar Craft's Mopar 470 testing, you'll remember that in the Feb. 2017 issue, we hit 700 hp while testing various rocker-arm ratios. In the May 2017 issue, we moved up to 720 hp ...
We had heard good things about Trick Flow Specialties 23-degree aluminum heads. If the claim was true that we could expect serious horsepower gains over stock heads and even some aftermarket cast-iron ...
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