typically yes, there is a hose running from the tank to a nipple on the exhaust. but not every car has them, though its more common that they do.
did you get any instruction sheets with it. there should be a spot where it says what the factory needle settings are for the motor.
most of them are NOT stnd. most all carbs have different settings when new.
if you can find out what the needle settings should be when new from factory, start there, and slowly lean out the H needle until the motor starts and stays running.
theres a great couple websites about motor breakin and tuning. if i can find a link i ll post it up for ya.
T