Holley info needed.

The one I have has holes in the dogleg.
This can, but not always, cause problems.
If it was mine, I'd plug the holes to begin with as there is no advantage to leaving them.

Of course I didn't know that until after banging my head against the wall for a while.
Made the mod but haven't switched back to that carb to test it out yet.
See photos here and links back to RFS
Holley Jet size