Carb adjustments...?

I agree with the above posts. In addition remember that our cars are old and the "new" gas has Ethonol in it. You may be getting a lot of crap up from your tank. I just had this happen on my 66 Dart wagon. I plan on replacing the tank and lines so it doesnt happen again. Also pay attention to the rubber hoses from the tank to the fuel line and the 2 pieces from the fuel pump and carb. If its not EFI fuel rated line the gas IS AND WILL eat it.
JFYI
Frank