I have seen this posted before, by other people.
I have always wondered how a bad fuel pump can allow a float bowl to drain. The fuel inlet needle/seat in the carb is higher then the fuel level in the carb.
I have this same problem on my 84 D-100 with a Carter bbd if it sits for more then 2 days, but I have not looked into the reason, yet. My 64 Valiant with a holley 1920 could sit for over a week, and start right up.
