You might have survived the fight, but did you pack enough hno3? (flamethrower fuel i believe) A tank would work, but I don't think those fit in the back of the truck. I think the best course of action would be some sort of sprayer gun. Have you ever played wpnfire? its an online game, and on zombie survival mode this question even comes up kinda. You have a choice of a BUNCH of weapons. I prefer flak cannon. >.> It gets the job done.