[MaSnaka]

It seemed the first and only thing Holley Tech said to me was to get a bigger accelerator pump nozzle. Didn't really seem to care about anything I had to question him on. I communicated via the email and it took weeks to get a reply from Holley. My second request for further info was completely ignored, again via the email.

The bigger nozzle helped. I think I still need a bigger one.

It's my understanding that the jets sizing has nothing to do with the hesitation. When you open the throttle most all vacuum is lost and thats the purpose for the accel. pump. It only works for the first squirt of fuel to get the rpms up. Once vacuum is restored fuel is pulled through the jets at the rate the orofice allows, hence your A/F mixture.