my Low dollar 318 hop-up project

I pulled the Eddy carb off the 318 Dart and went back to the Original 273 AFB. Was going to try swapping early venturies and 3 step rod setup into the Eddy to see if that would help, but have not had time to play yet. Some early AFB's had very large accelerator pump squirters. You did tune with the secondaries locked out to take that out of the equation?