I converted my WRC Corolla into RWD. All I did was remove the drive cups and dog bones from the front. It's much more fun to drive now but more difficult because the rear end slides very easily especially with a low turn modified motor.
The TA03 is very special because it took Tamiya to the top of professional level competition. It has a true racing heritage.
http://teamtrf.com/index.php/about-trf