I have warn 9500 winch on my open trailer...

Few things to think about before buying.... most recommend 1 and 1/2 time the weight, me I would suggest 2times. Are your going to be pulling with single line or duel line? with a duel line it will pull more weight but is slower.
Mounting- make sure you mount to frame rails of trailer, I recommend welding and bolting to c or I beams to trailer frame rails and the winch to them. most trailer builders on make there mounts to 5000 lbs... witch is just on the edge of "safe" for a 3200lb car. and last but not least... make sure you strap the front, even with the winch. winches WILL back off in transport...