I have looked at several carb alternatives for mine. However, I decided to make a new intake manifold and use a WT type carb. Took the engine completely apart to clean it and see what makes it tick. While apart I drilled and tapped a spot in the block for a pulse tap to the WT carb. Just turning by hand produces good pulse. Got the idea from a guy that uses these in boats turning over 10000 RPM. He claims no problems with this setup. If this does not work for me I will just plug the hole and make a manifold to rotate the WY carb. Found several with high needles and 10.5mm venturi. All I need to do is weld the header pipe I just made to the flange and time the engine. As mine sits it is at 4 pounds.