I thought you had already added upgraded torsion bars when you added the winch/bumper combo.

With upgraded t-bars loading effects will be less noticeable.

I can assure you that the loading/handling effects of a 200# bumper/winch combo are much more significant than a 260# front seat passenger. If you saw my diagram it yields nearly a 280# weight differential between wheels (238 - (-38)). A 260# probably won't evn yield an 80# difference. The passenger is taller, so it will affect the height of your center of gravity more.