My '48's 235 barley has 600 miles since full rebuild last winter. If its sits for more then 4 or 5 days it takes awhile to start and the battery sounds like its going to give up. I think the problem is like 51bolt says "it takes a while to get fuel from the pump to the carb". I have a glass filter a few inches before the carb so I can see the fuel.
If the truck has sat longer then a couple hours, I stomp the gas twice, crack the throttle lever, and pull the choke 1/2-3/4 out.
The batteries wining has made me nervous, but has yet to leave me stranded. So I'm happy with the factory setup that I am running.
