With a 235, I successfully towed a 1 ton car hauler with a 3500 pound 1995 Trans Am on it. However, that said, when a tire blew on the trailer, it almost pulled my truck off the road...which is exactly why Uhaul no longer rents out car haulers unless the towing vehicle weighs at least as much as the entire weight that it is towing.
Plan on about a realistic 3500 pound tow capacity for your truck. It's not that the 270 wouldn't handle more...it certainly would, if my 235 did. It's just that any more than that and you have an unsafe condition.
