It's an interesting idea - I'm sure you could make a Soarer just as quick as a Supra in a straight line and and through the corners. They even make carbon fibre doors for the Soarer in Japan (about $2K each though!).
However, after a while you will realise that although;
it's faster than most Supras in a straight line
it handles better than most Supras
it's a bit different and unique...
It's NOT A SUPRA - and this fact may disappoint you after all that effort (especially if you just really want a Supra).