Ford Repair: Holly Carbs, double pumper, throttle response

Question
Other than the obvious, what is the difference between a Holly 750 single and 750 double pumper carb????Thank you!!!!!!!!

Answer
Tom-

 Well...other than the obvious there really isn't a huge difference.  A double pumper generally gives you better throttle response because of the extra accelerator pump that gives you an extra squirt of fuel when the throttle is snapped open.  That's pretty much it.  Hope this helps.

Steve