I will run eventually it is nothing wrong to change to a carb when it is a perfonmance oriented one like the side draft, first check your timming leading and traling you got to have that perfect before playing with the carb, use the right plugs for a carbed rotary 13b, and then play with the carb, my guess is you are running a carb in your car that was intended for a dual carb set up. if thats the case you need to deal with the pump jets and you may need to go up in main and idle jets who knows if the venturys need to be changed too! by the way it need to be perfectlly sinchronized with the buble tool to ensure both sides are working at the same rate cuz you are feeding each rotor of your engine with only one side of the carb, if i was you i will discard that set up and step in a holley 4 barrel set up! way more powerfull!