16' isn't much more than a large car with a front engine
and rear tank. Today's cars have electric
pumps, but in the past used lift
pumps similar to most boat
engines. The fuel line would be best if it was without too many up and down bends that could leave air pockets.
Another option is to add an inline electric pump
. I have then on my mains. I use them for priming my filters. They're also handy if your engine has set for some time and there's air in the lines. The fuel flows thru the pump when they're not running and the lift pump is doing the work
. They don't bother the lift pump.