The Rancho 9 way adjustable shocks are great for the rear of a street/strip car. They use a convenient little adjusting knob to change shock settings.
For my own experience with them, I first ran them on the street using the recommended strip setting of "5" and found the ride to be quite harsh. I rode around for a day like that an got tired of the bone jarring ride. The next day I pulled off the side of the road for a couple of seconds and set them to "1" (the softest setting.) I found that the ride was much, much improved.
A nice drag only OR dual use shock. Ranchos get a

from me for practicality and ease of use.