Question for Holley jetting pros.

TrailBeast said
The carb is super clean and no fuel dripping from the boosters like a blown power valve causes.

If the power valve is ruptured or not sealing, fuel goes straight down into the manifold. Unless you have a 4- hole spacer underneath, then it spreads out a bit as it goes into the plenum.
Dripping booster would be fuel level too high.

TrailBeast said
It is possible it might have a wrong gasket, but could that show up as being two or three AFR numbers rich all through the range except idle?

There are two gaskets shapes. One is slightly triangular on the inside diameter. Sometimes those gaskets split upon removal; one half sticks to the block and the other half to the power valve.

TrailBeast said
It starts runs pretty much perfect other than being a little rich.

Yea. Sure. It's rich! That's what engines like when starting.