This is a (picture of a picture) of my original LeeCraft XT 120 I ran in the early 90's. If you look closely you will see I used a venturi setup by utilizing the carb mounting screw holes for the needle and a 707 Specialties blade exhaust throttle and Equi Pipe. It leaked some but the power was awesome in the day. This same arrangement was used on the outboard hydros with no pipe.
