Just because you can do a thing... doesn't mean you should, do a thing.
A set of air bags and a trailer sway control would have made this a lot easier but we got 'er done on a budget.
There's a whole thread around here somewhere, with tons of pics of people towing stuff with their FSB's.
I tow with mine all the time. If properly setup, an FSB can handle a lot.
If you plan on towing a lot, along with the sway controller, trailer brakes, and air bags... a trans filter w/temp gauge might be a good investment.