If you just want to achieve the Gold time to get the money, I did it with a Clio Race car, completely stock not even a oill change and did the required times really easy.
The Drift, wich I had never tried to drift took a stock Silvia S15(the one that you can RM) with CH tyres and took me 3 or 4 times in Fuji, In the Snow track did it with the Loeb C4 and it was even easier.
Hope this helps.