Hi, wanted to add to this thread as I've been stuck on this event for the last week but have just finished Fuji.
I used the 962 for all races, power restriction down for Willow Springs and RBR, hard tyres and whichever FM was needed to do a no stop. As RealRacinGuy mentioned it's a great car for controller!
At Willow Springs the 962 had a big advantage in the last, first and second corners but lost out on acceleration down hill and straights. The AI did seem to punt each other off which was useful too.
On the RBR it did rain which forced the AI in but having tried it enough times I stayed out and nudged my closest rival wide at turn 2.
For Fuji I added as much ballast as possible before restricting the power and added the transmission set to 310. The AI still has way more top speed than me but this mitigated that as much as possible. For this race you need a high FM to make it to the end but I got lucky with rain at the end of lap 8. So I tried again on FM3 and switched to Inters. The AI then panicked and all pitted again so I took the lead at the start of the last lap and won by 3s. I managed to lap around 1:37 in the dry. No idea how this race is possible on a fully dry track.
Don't give up sometimes you just need the stars to align!