use a automatic shut off nozzle at the gas station and use the stock setup and plumb a line into the ford tank with a small transfer pump  that feeds fuel into the vent line of the toyota fill coller  and then when the toyota tank gets low via the stock gauge you flip a switch that turns the pump on and feeds fuel  into the toyota tank from the ford tank thats the way we did it  and we have roughly 80 gal of fuel  that is kept  in reserve.