After 2 hours of trying I finally finished that god for saken series. Nurburgring wasn't the worst as I had suspected but Silverstone was very, very , very painful. I still hate that track. Suzuka was a challenge at first but when I figured out the esses I pulled away pretty well. The haipin was a chore but not impossible. Laguna was a ray of sunshine. I had a huge lead there, huge. The car was actually controllable, predictable, I was able to get on the gas early, the braking zones were uneventful and dare I say it I was having fun.
I will not be doing that again. My times are my times and they will stand forever in the books as crap but finished none the less.
My generalization form this "event" is that the GT40 is not a good S-class car in stock trim. I recomend never trying it, unless you really want a challenge that no assists, hard AI, and a slew of horrible tracks can't provide.