Starting issue

Dump a little gas down the carburetor. I've had this problem with my 1980 Volare with the same engine, since it was new. I used to purposely run it out of gas, then put in a measured gallon to check the fuel mileage. I found the engine would never start without adding some gas in the carb. Cranking speed is not fast enough to make the fuel pump draw gas from the tank. The engine needs to be at running speed. The intake runners on the slant six are so long, it is not easy to flood the engine when pouring gas in the carburetor. The engine will run for about five seconds on less than a quarter cup of gas. That is usually long enough for the fuel pump to catch a prime and keep on pumping.