Bill, have you gotten the winch yet? I'm wondering if you mount it on top of crossmember B there will be room below the bed for the crank shaft to extend thru, or if it will be higher than the bottom the bed. I guess if so, you could use the bottom flange of crossmember B to mount it, or maybe somewhere between the two crossmember heights. Like you said, 1/4" steel shouldn't be too hard to bend. You might wind up with an upside down U with legs extending down to each crossmember.
