Engine stalls going over speed bumps

Unless you have a completely wrong rear end ratio, then it can only be one of a few things, one would be float level too high and sloshing fuel. two would be electrical connection. If it instantly restarts after speed bump, does it blow a cloud of black smoke like a overly rich condition? Does it restart but, loaded up? What happens if you hit a bump at speed?
does it seem like fuel or spark when it dies? If you keep your foot on brake but keep rpm up with throttle does it still die? Drive-ability issues require a lot of logic and elimination of components. Eliminate as many causes as you can and concentrate on symptoms and conditions. Change speed, rpm, etc. If you jack front end up and try to start car, does it run correctly? Have you checked float level? Holleys have level screws and should be even with bottom of hole, Edelbrocks/AFB's are checked by float drop. What happens when its running and you "bounce" suspension by shoving on fender?