650 dp vs 750 dp in a 408

There was an article in HotRod where they strip tested 4 carbs on a street strip 434 ci Ford engine from memory in a Comet. The old 650 DP ET'd quickest. I have to laugh because all the others look like more expensive version Holley's with drop leg boosters and adjustable bleeds. Yes they tuned them from memory......
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Every combo is different. Give the engine what wants.