The Holley Avenger carbs I have used, seem to be setup for emissions / economy.
I have the 670 cfm Truck avenger, and the 770 Ultra Street Avenger.
On both, I had to enlarge the idle feed restrictions.
The power valve restrictions might be OK depending on your setup. I think both of mine are a bit bigger.

For the cost of the Ultra Street Avenger, you would expect the metering block to have screw-in restrictors, but it does not.