Ok folks I have my first question for the board. I have a new 350 300 hp crate gm engine and a rochester q-jet, it preforms ok but for a 300 hp engine it is defently not there. I have about 16 degrees base timing no vac leaks. when i take off (ie) getting on the highway coming up to speed it seems to just not be there, it does not bog or backfire or spit it just does not seems to rev rpms up when i steadly get it gas almost like a sag, when i floor it the secondarys kick in fine but just seems to be lacking. I rebuilt the carb 3 weeks ago and made sure every little port and crevice was clean even drill out the idle screw ports to 80 thousandsth. vac advance works great and power piston is not stuck. Any suggestions? thanks for the help!