Why not use the stock shocks? Cranking the torsion bars doesn't change the suspension geometry, so why do you need longer shocks? Longer shocks will compromise up-travel and likely allow too much down-travel, letting the suspension hyper-extend the CV joints, and playing with the steering geometry. It could potentially cause binding (and eventually breakage) of the ball joints. If you look at the angles of the control arms, ball joints, tie rods, and halfshafts at full droop, then let the suspension droop 2" or further, that's just asking for trouble.
The only longer ones I've seen are designed for a 4" suspension lift on a Ranger... In *theory* the bodies should be about 4" longer on them, but they're not going to have any more travel... You'd just be limiting your up-travel with them (because they would be further compressed at rest) running the risk of bottoming them out, and could over-extend the suspension at full droop. Why would anyone want to do that??