I have a 72 gmc pickup with a 350engine and a 4brl carb,the problem is that my carb is not getting any fuel but when I remove the fuel line from the carb it's full of fuel,and when it does run as I step on the gas it just bogs out,also while engine is off as I press the throttle I can see a strong stream of fuel coming out the jets.but when running no fuel comes out of the jets at all