6T2Burb,
At first, one question: what engine are You plan installing/using them??
The deal around these carb systems is the fact that each throtle body feeds only one cylinder. All the bores go in the same time, no stages here. Also, You have no communication between the cylinders. Then, the pulsation down the carb is so strong that You just don't need a suplementary enrichment system to overcome the opening of the throttle as in a normal carb as to bring the main fuel system into life, except of course the pump injector.
Tuning them is another history. There are some guys like the people at inglese that can offer You some help in the tunning process. If You're using 40mm carbs, start using the 34 mm venturi, and play with the air bleeds, main jets and the emulsion tubes. It's hard, but worths the labor. Make sure the carbs are in good shape, and don't forget, You'll need a tool to tune the idle, like a synchronizer, that measures the air stream in each and every bore, or else it'll not work fine.
Don't forget to get a good set of air cleaners, and a good fuel filter, as they are sensitive to small particles and dirty.
