I'm a fan of the Holley but the accelerator pump must work properly for the carburetor to perform as intended (as must the vacuum advance). If the pump is badly corroded, and one needs to get things going in short order, the most cost effective solution is replacement with a Zenith.
FWIW, the Holley is quite economical when functioning properly because the accelerator pump/power valve allows tuning the engine leaner in normal operation. The accelerator pump prevents stumble upon tip in with the lean mixture. Without the pump, the engine would need to be tuned more rich for normal operation, resulting in reduced economy.
Yes, there is a price to be paid for the increased sophistication of the Holley as compared to contemporary MS, Zenith, etc., models.
Sure liked that restored late model 3000 that I saw at the show.