I understand the reasoning for moving the pivot holes. I believe Cliff shimmed a needle and seat to move it down. Keep in mind that they did work with unequal lengths from the factory and they had a reason for doing it, the reason escapes me right now. I believe it was G forces. BUT, as I stated before, the mixture adjustment screws are FINE TUNE ADJUSTMENTS ONLY. The primary mixture adjustment is the float (fuel) level adjustment. Until the float level is very close to the proper setting, the fine tune adjustments (mixture screw) are not going to compensate for float levels that are too high or low. Pull the damned tops off the carbs and tell me where the fuel level is in relation to the tops of the nozzles at 2 1/2 turns down. Until we get that settled, all else is uninformed guess work.