Just measure it yourself. Google 'how to measure rear wheel travel'.
There's a ton of stuff to read-
"Theres lots of ways to do it, I think that this is most accurate. have your truck on jack stands, take your wheel and shock off, measure the distance to the ground from the center of the hub at full droop, lets say its 3 inches, than measure the center of the hub to the ground at full bump lets say its 18 inches, that means you have 15 inches of wheel travel."
Mark