Rep... Great advice ParagonGT. 👍
Regarding which cars are best for this series- I'd say something other than the Cobra.
I only say that because the Cobra really will use tires fast.
My suggestion is specifically the
Jaguar E-type. You can max out the power and leave everything stock but it will still handle well. Can't beat that. 👍 (may need a transmission for the extra gear but I don't recall)
I used the Jag for my run on this series and it was great.
Regarding settings for the Cobra.
Being that you've got to run The Ring, Opera, Cote, and Sarthe, I'm going to suggest ideas to look for in your final settings (even if you are just picking from what is posted)...
Go with low camber and no toe, then add a strong limited slip diff. Those are going to help tire wear and provide grip (respectively).
Good luck with your racing and if I see that no one has posted settings with those concepts I may be able to get back here and post some for you.

Till next time,
-
btw, another great car for that would be the old 2000gt Toyota. That thing is really well balanced just like the E-type jag, only difference is the 20000gt can be purchased from toyota (the jag is a prize car).