A Holley problem all should know about and Why Holley Tech S#@KS

Just looked at my freinds dart. Its doing the same thing. and he thought his car was running just fine. 340 4spd holley 650 . We will be putting on other bowls when he finds some. He said to me no wonder it uses so much fuel on the highway. he stated it gets better mileage around town, I never thought of that.