After three years using the game I managed to do it. I used the tuned corvette, the settings where as light as possible, ok, some power has to go to get it to 750p. The final gear ratio I put totally to the right, since the top speed on the circuit is not that high. Sixt gear I put also on the slowest speed possible, to get a smooth 5 to 6 ratio. A bit more steering angle, just a tiny bit of abs and traction (both on 1)
It took a lot of practice, but by focusing on the brake points and race line, I managed to get the lap times down to 2.02 / 2.03. With clever overtaking 4th place is to do, and then third gets near. I overtake sometimes by taking the inside line, and running into the side of the other car. No penalties for that, and he flies off, and I make the corner.
Don't get to eager, base is focussing on race lines and brake points. Finally I managed to overtake number three two corners before the chicane in the last lap.