Zac,
As your carbs have no needles or needle jets, they are as you say, track carbs. As such, they were intended for use with dope (methanol) and can only be tuned for tickover, pickup and full throttle - there is no mid range adjustment. This is fine with dope as it is less critical than petrol regarding mixture strength - also, dirt track machines tended to be used at small throttle openings or flat out - mid range was of little importance. For road use, you may find it better to revert to the 'normal' type of carb with needles - pilot air controls the mixture up to 1/8 throttle, then the slide cutaway takes over until about 3/8 throttle, then the needle and jet control 3/8 to 7/8 throttle, with the main jet controlling 7/8 to full throttle. These are only vague changeover points, as each setting can be influenced by the setting either side of it - and obviously, if too small a main jet is fitted, it wont be possible to correctly make the other settings as the fuel has to pass through the main jet before being contolled by the cutaway or needle. Only the pilot jet has it's own independent internal fuel supply.
Hope this is of some help,
Regards,
Eddie.