Eddy 650 AVS vs. Holley 650 DP

Both carbs have their place. IMO, the Holley is geared more toward a hotter street/race scenario, while the AVS is much more forgiving for the street. The AVS is comparable to the Thermoquad in streetability. The secondary air door completely controls air and fuel flow, just like a Thermoquad and unlike with an AFB. If you're after any semblance of mileage, run the AVS.