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An Edelbrock Performer EPS dual-plane manifold is coupled with a 680-cfm Super Street Series vacuum secondary carburetor from Quick Fuel, Ben Smeding's carb supplier of choice. Smeding Performance has its own in-house dyno that is used to break in engines and provide horsepower and torque figures for the owner. This allows the company the knowledge that your engine ran properly with no leaks or noises before it was shipped. It's also essential for timing and carburetor adjustments before delivery. My 383 benefited from some jet changes. The carb was supplied with 74s in the primaries and secondaries, but swapping the secondaries to 70s, then going to 75 in the front and 69 in the rear produced the best horsepower and torque figures of 468.3 lb-ft and 420.6hp. All that remained was to crate the engine up along with a flexplate and bolts (supplied but not fitted for shipping) and load it into my pickup! View Related Article
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