Edelbrock accelerater pump

Anything that can be removed is removed prior to a dip. The air valve stays closed when the throttle is moved. I wouldn't think it would open with no load.

I had this same problem when I had the Holley on it. But the Holley would have nice response when idling in park. It would only go into a lean like bog when gradually increasing speed going down the road. Mashing the pedal from a stop would spin the tires. Only seemed to do it when a rolling start.

Current time is between 18 and 20 initial with FBO limiter plate in the 14 degree slot.