no you cant make those changes due to motorsport having a huge impact on the environment. *cough*
thats why F1 is thinking of going turbo charged.
Besides you sound like a hater. I still believe that with GTR tuned and having all the same goodies as a v8 supercar, ie, no back seats, racing suspension, tyres, brakes, perspex windows and the list goes on........ it will stand a good chance of showing them who their daddy is!