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.