First, I think traction bars are meant to be used INSTEAD of Super Stock springs, not WITH them. The whole purpose of the extra leaves in the SS springs is to stiffen (and in some cases shorten) the front segment to try to reduce wrap-up/wheel hop, which they do at the expense of ride quality. Clamping the front segments along with the use of properly installed traction bars will eliminate wheel hop and increase traction without stiffening the ride.

As to the snubber, while it does a limited job of eliminating front segment wrap-up, especially if the front segments are clamped, they do NOTHING to prevent the axle rotation from trying to pick up the passenger side tire. This is not the ring gear trying to climb the pinion; this is the ring gear trying to rotate around the pinion, which tries to pick up the passenger tire ( the reason why open carriers always spin only the right tire). Slapper bars can be pre-loaded to give more lift to the passenger side.

Slapper bars got a bad reputation from poor installations and a lack of knowledge about suspension engineering - pure and simple. With a little work they can do a fantastic job of stopping wheel hop and enhancing traction.