I recently bought a rebuilt Q-jet, as my old one was leaking gas all over the engine. I live in San Francisco, so you can imagine I have to park on extremely steep hills all the time. After installing the new carb on my '61 Impala & park on a steep incline overnight (downhill), gas seeps into the cyclinders and the engine doesn't turn over. I have to drain the gas out of the spark plug ports._ Gas also leaks out of the airhorn seam, this is exactly why I replaced the old carb!_ Everything is tight, it doesn't leak when parked on level ground. Is this normal? When thinking about how carb floats work, how can it work when tilted at almost a 30 degree angle? What could I do? (besides move?)

Any advice would be helpful!