Racer, this was for a rouny round car, and we ended up having a local guy make a intake, for the life of us we could not make the Esslinger intake work, we tried a Holley 350, and 500 cfm 2V carbs, we made an adaptor plate so we could slide the carb front to back and side to side, we even made a plate to set the carb sideways, nothing worked, it has to be something with the high Pulse's these little engine have...
as soon as the other intake was installed, the problem went away....