1979 Super Six start issues

The question to ask here for a proper answer is. How long has the car sat before this condition happens? After a couple of weeks, this will happen. The gas in the bowl and motor evaporates and you have to refill the bowls in order to get it to start. The squirt bottle shot to get it started is enough to get it running where it re-fills the bowls. Either install a switched electrical pump to prime the system or just do the bottle trick.