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You won't listen but 750 street demon. More throttle response than you will know what to do with and the air to feed it upstairs

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(except for the 750 part) The Double Pumpers are awful rich when used on a street car unless lots of time is spent tuning them. They are good carbs, but are more geared toward acceleration competitions than cruising.

The Demons start much more street friendly on their tune. If adjustments are needed, they are fewer and typically take fewer steps.

And besides the tune, the Demons also have some street friendly design features that the Holleys don't. Which will also help throttle response and driveability.

If you are choosing for the strip, then I would probably choose the 750 DP. But for the street, the 625 Street Demon should get the nod.