Stick with the Performer RPM and the 650 Holley. The 650 is not too small at all. Its about the perfect size. Ive done a lot of dragstrip testing with different sized carbs and different sized motors and was shocked to find that going smaller on the carb than conventional thinking implies, resulted in quicker ET,s. BTW my testing proved to me without a doubt that a properly sized Holley 4150 was always quicker than a Q-jet. Several other racers that I know came to the same conclusion. They just don't post here.
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