1971 opel 1900- hard time starting and accel

i have a 1971 opel 1900. the car runs, but wont start unless you pour gas into the carb for a minute or two. then it will idle just fine, until you hit the gas. then it seems to not get anything and shut off. but if you sloooowly push the gas it can accelerate. im new to the foreign car/carb thing, so any help would be good.