Any of the 210 models could likely work. The heaviest is the 210 UDS at close to 3600 lbs dry weigh. That leaves 3000 lbs for everything else. You don't say which truck you have, or how it's equipped, but assuming you've got a tow package and can handle a 400 lb hitch weight you should be OK.
The FF brochures with specs are posted in the 'FILES' section of this site. The link is at the top of the page. Here's an online calculator that will let's you plug in the specifics for the tow vehicle and it will calculate what you can safely tow.