use the search function to bring up the info from previous threads ..
in basis - i know of one st204 being done - but eventually was cubed i believe because the geometry didnt work out right , and it cost an absolute fortune to engineer
the advice rings true - when youve had your fun with the front wheeler fun - sell it and buy a GT4 - for the time , money and effort required to do so - you could and will be able to pay for a GT4 twicefold , and STILL not have a good as car