Dang! I forgot about the location of wagon tanks. You could use an external pump right next to the tank. You'll just have to make a bigger pickup tube, and leave the sock off of it. Be careful of what the micron rating is of any external filter you would use. EFI filters need a different rating than carb motors if I remember correctly. Just be careful to not let the fuel level get below a quarter tank, and the fuel slosh with no baffle may not be an issue.