I just completed a HEI conversion and now need to dial in the Rochester 2 Jet (2G). It's been cleaned and there's a new accelerator pump installed. Starting sequence is as follows: - Pull the manual choke knob all the way out. - Pump the gas a couple of times...Fires right up every time. - Adjust manual choke until things settle down to 650-700 RPM. - Push the choke knob all the way in. Issue: - Rev the gas and sputter/pop...Feather the gas = No problems. - Pull the choke out just a bit...Rev the gas and it's perfect. I've messed with this thing and I can't emulate partial choke. The mixture screws are 2 turns out max. When looking down inside the barrels there's no stream, it's more of a dribble.