I have a ’53 3600 with a rebuilt 235 and am having a fuel problem. If the motor has not been started in 5 or more days, the fuel filter (clear plastic) drains and the fuel must drain down to the pump. Under this condition, it takes almost all of my battery reserve to crank enough to get fuel into the carbs (a pair of Carter/Webers)(chokes work fine) to finally start. Once it starts, it runs great. It will re-start easily that day and for several more days and then drained after that. There is no fuel smell below the pump so I do not expect a drip leak.(possible though) I have attached pics in Photo Bucket http://i982.photobucket.com/albums/...uel%20system/Fuel%20pump_zpsc5odfo9d.jpg
Should this particular pump have a back flow preventer? Should I insert a back flow preventer in the line and if so, where? Someone said to install an electric fuel pump on the fuel tank side of the mechanical fuel pump and let it fill the pump and line and it should start. Is this the best solution?
If I have to replace the mechanical pump or get re-build parts, what do I have?
John Hill

"It wasn't broke but I still decided to fix it. Now its broke"
I really love my coon hounds
Pics at http://s982.photobucket.com/albums/...0truck/53%20Chevy%20truck%20Sept%202010/