On the weekend, I ramped 517 on a 23 degree RTI ramp. I've seen some print sources that say the average box stock S-series truck/utility will only ramp between 3 and 400. I've got a stocker, and I ramped way over that. Could it be because of the very conspicuous absence of a rear sway bar on my Blazer? It doesn't even look like there's a provision to mount one. My mom's 98 has one, but my '88 doesn't. What year did they put rear sway bars on the S-series?