Thats on my to do list but who knows when.... That said I've read a lot about guys using Ford f150 series trucks from the early to mid 90's. Apparently they use the auxillary tanks, they hold 18 gallons. Also they just modify the Toyota pump and sending units to fit the tank.
We'll see how bashed up my tank gets in its stock location this summer. That will determine the speed at which I do the swap.