I can't help thinking that 13000 lb might be a bit big for a Sportrak.
The vehicle weighs at about 1500 kg, about a ton and a half. 13000lb is 5.8 tons, nearly 4 times as much, so the weakest link could end up being the Sportrak chassis! A 6 ton winch is what was fitted to 4 ton Bedford army lorries, the MK and RL. There are issues with large winches with current draw, you would need a split charge system and a LARGE supplementary battery, the original wouldn't last 20 seconds pulling that large a winch. Also theres the weight to think about, the weight of the bumper mount and the winch itself would be considerable on a relatively small vehicle. My advice if you really do want a winch would be to go down a size or two and get a 6 or 9000 lb winch.
I have been off roading for years and still haven't got a winch, (although I'm in the process) what is needed off road ultimately is lots of grip. I'd recommend you to spend your money, at least initially, on tyres and suspension improvements, so you don't get stuck in the first place. Hope that helps.