The problem occurs in city driving, approach a busy intersection, shift to 1st or 2nd engine is at idle let out the clutch accelerate engine stumbles then clears up. It smooths out as I come out of the turn, don't know if it's because going straight again or if because rpm's are up.

All I know is it only does it when turning at low speed from idle, period!

It has to be something to do with float level and/or the pump. The odd thing is that it happened with 2 different carbs, both were brand new Holley's.

I checked the float levels twice on the latest carb and they are correct, will try messing with the pump settings/sizes.