I have used a 95 gal RDS gravity flow tank in both Chevy and Ram trucks, no issues what so ever. They just connect to the filler pipe about 12 inches down and have a check valve to prevent overfilling. I always just put fuel in the large tank and go, over the years I have saved many a dollar in fuel costs, sometimes up to a dollar a gal by bypassing a state where fuel is extremely high and not having to refuel until you want to is a big plus. Wouldn't tow without one.