Total Rebuild of a 1979 Dodge Class C

oldtrucker63 wrote:
...Maybe a easy way would be to hook a electric fuel pump to it and see if the fuel will stay up, Thats the only thing I can think of.

That was the solution I used on my previous 1977 Coachman on a Chevy P30 chassis. If left to sit for several months, the engine would crank for quite some time before getting fuel to the carb. Actually didn't know if it drained back or evaporated and didn't care. I installed an electric fuel pump near the tank and put a lighted toggle switch in the cab. Was real easy, sit in drivers seat, flip switch, wait for about 2 minutes, hit starter and we were running. The electric also provided a little insurance to avoid vapor lock.