I used one like this mounted inline before the mechanical pump.

http://www.napaonline.com/napa/en/p/BK_6101074/BK_6101074_0498432605

I turned it on with a switch before starting and then turned it off. This is probably not a viable set-up for a car that needs LOTS of fuel flow but it worked fine on my 440 max-wedge look-alike street driven car.