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After testing the new carburetor at the same timing setting, we bumped the timing up on the engine to get it dialed in with the new carburetor. We advanced the timing to 14 degrees initial and 34 total and put in some 91-octane gas. Overall, the new carb and increased timing made our test session a success as we picked up well over 20 horsepower at the tire. The combination of the swap and setting the timing at 34 degrees total advance got us right up to the 320-rear-wheel-horsepower mark with 320.2 at 5,400 rpm-an improvement of 15.9 horsepower on top of the carburetor swap.