Your rear suspension has a lot of adjustability, why not set up to use both?

The diagonal bar would be stable enough and still allow all the adjustability for the few trips to the strip, but probably lacks the stability needed for the street. The Panhard bar adds the stability for the street, but will reduce the adjustability for the strip, but it would have to be added after the primary rear end set up for the street use, for the best street set up.

You can use the diagonal bar to get both the strip and the street set ups, then add the Panhard bar for the street set up. A simple two bolt removal would eliminate and two bolts added would cover which ever option you do or don't need at the time. If you mark the best street set up, and the best strip set up, both could be different, and you could use the best rear stabilizing set up for either use, Panhard bar for the street, diagonal bar for the strip, and the strip setup can still be adjustable for the strip conditions.