I have fallen to the on-road darkside....

[SixVi6-Camaro]

You will need the wing mount piece to mount a rear brace made for a buggy on a GT.

you can see the piece in this pic on my old Landmax 2

http://home.comcast.net/~exsells/lmaxx_67.jpg

and on my GT..

http://home.comcast.net/~pewter_camaro/GT_20.jpg

I bought the Al one but the plastic version is available too but you have to buy like a $7 parts bag to get it and the aluminum one was $10 on ebay.

Here is the GT forum for ya ThirdGen

http://infernogt.proboards102.com/index.cgi

Other things I'd do when you get it.. replace the steering link that connects the servo to the bellcranks with a real link intead of a Z bent wire. Also the brake fades bad if you are hard on them. Mine used to be heat glazed it was soo bad so upgrading to a better brake rotor or running multiple brakes rotors is a good idea. Other than that I don't know how good a stock GT is because I never Ran Mine in stock form