10 years ago I turned a dragster over on it top. It slid upside down and facing the wrong way from the finish line until it came to a rest. I was lucky that the front wheels were touching the ground, allowing me to keep the dragster in the middle of the track until it came to a rest. It took out a slick, knocked the scoop off and scratched a header. The reason I told this story is when I got to the other end the engine was still running. In my state of daze I even racked the engine back before I killed it like I would any other time. The carb works on vacuum more so than gravity. A stutter is probably a lean problem, IMO alittle tilt of the carb wouldn't cause it, unless you have a bowl set to high.....