car stumbles in the air!

[brett3533]

had similar problem w/quadrajet and found that i had left out the block off plate under the top of quadrajet. when i was on the dyno the carb functions perfect. put on the car and would almost quit running on the launch, the harder we launched the wose it got. who built your carb and did they even use one of theses plates they are not part of rebuild or stock equipped we used to use a peice of black electrical tape years ago but now mike mcdonald and danny ashley,at Q/jet performance rebuilds and enhances my Q/jets and he makes a custom plate that the rear meter rods fit perfect. the tape would be a quick cheap way to check,but it does not last. I am pretty sure this will fix your problem. if it does you may want to get in touch w/mike mcdonald or danny ashley. plese let us know if this works