Do you get a lot of sway in the rear of the van when driving it? I have a 400 gallon tank, and worried about that in my 02 chevy 2500 van. I'm looking at an box truck (03) that a guy wont's to trade for my van. I'm thinking it would work better, and i could cut a ramp into the side, and mount tank at rear. With the room i might get 2 tanks in there. Since their built for heavy loads. Then tons of room upfront for everything i might need. Make it much more easy then running my truck, and big trailer.
Edit: To the above, my 2 400 gallon tanks have hand adi mixers.