Yes I installed the Cal Tracs after I switched to Nitto drag radials and started having wheel hop issues. Still working out the kinks, but I bought a new set of M/T drag radials which I hope will help.
I was considering Caltracks but decided to go with the Streetlynk rearsuspension instead. (Pics Below) It gave me more tire room, double adjustable Viking shocks , a four link setup and, Bill Rielly (RMS Suspensions) put together a 7/8" rear swaybar setup for me as well. I'm hoping I have all the necessary components to make my car launch hard as well as improve the handling.
We'll see....