IMO, if you are going to drive this on the street it NEEDS power valves on the primary side. Those who say otherwise do not grasp what that valve does.
Install power valves and you can drop the primary main jets at least 6-8 numbers. Then tune from there. You‘ll never get your cruise A/F ratio close without power valves.
I swear that Holley has done more damage to that carb and how it works and tunes than anyone else. They STILL have videos, books, YouTube advice on how to incorrectly time the power valve circuit. It’s idiotic.
