Make sure you go with the thick wall CE kit if you get it. I run the thin wall and it flexes pretty good. I added some bracing and it seems to be better. Definitely measure 12 times and cut once. I ended up getting mine in the s10 within 1/16 of square over the entire body and it launches straight every time.
Pics: Joefarmer's Albums :: S-10 Backhalf