The right solution to getting a clean cutoff is to cant the tank inside the body so the rear end is outboard of the front end. This makes the engine run strong until the pickup opens to air and the run stops clean. If the tank is parallel to the fuse centerline, the fuel will draw down until the pickup is uncovered, sputter, and the line drag makes the nose yaw in. The fuel runs back, re covers up the pickup and the engine runs full song for about a few yards, and the cycle repeats. Very awkward. If fuse layout prohibits a canted tank, try cutting the end off the pickup at a shallow, long bevel. Its not as good as canting the tank, but should give some improvement. Tom H.