[tdangle]

Originally Posted by Dead Parrot

I was curious about the carb. 2nd hit on my search found this:
https://forums.holley.com/showthread...venger-Problem

Sounds very similar to OP's issue.

Wondering if they are tuned out of the box for max power at higher rpms and don't work well at low speeds?

I'm thinking the same thing. Maybe the idle and transfer circuits are not well matched to something over base stock motors.