/6 starting problems

Well after 4 years of sitting I have gotten my barracuda running. Here's the problem. If I prime the carb with some gas then it starts immediately and runs well. I can give it gas, rev the motor and bring it to an idle and there seems to be nothing wrong. However, it will not start unless the carb gets primed with a little gas first. Pumping the accelerator first does nothing.

Any suggestions?

Thanks FABO