I run the mustang GTR body on my nitro tc3 and it looks great. My old body was a porsche 911 and had no high speed stability. I put this body on and it made all the difference in the world. Lots of high speed stability, slight on throttle push but not horrible. Very hard to get the rear end out of shape. Only complaint i have is that you have to cut the body very weird in order to fuel it with the body on. I dont race so i didnt even bother i just remove the body to refuel.
Kyosho 777 WC w/ big bores, RB S5, ACE 1313 s., Air 357 t., JP-3
HPI Savage X SS, Axial .28, Hitec 5645 Steering servo
Nitro TC3, O.S. .18 CV-R
Associated RC18T, Brushless, Lipo