Jopper,
I'm with Ant on this. I do not want to worry about a blowout at over 100. Gotta have at least H rated tires.
I want neutral handling with controllable 4 wheel drifts. That means the contact patches have to be about the same size. I tried many sets of tires trying to achieve neutral steady state handling. It did not happen until I put 275/60/15s all around. Yes, the fronts stick out of the fenders a little and they look too big. But, look at the FFN spec racers. They are all running large front tires to get the balanced handling.
So, the front tires need to be very close in size to the rears for handling, say 265 or 255 section width. They need to fit 15" rims and be H rated. There's only two tires made like that. One is the Scorpion made by Pirelli. It is a VERY noisy tire. It comes on certain pickup trucks and rumbles like a steam roller. The other one is a new tire made by a Chinese company called Maxxis and it's called the MA-S1 Marauder. It's also made for light trucks and we will not know it's strengths/weaknesses until one of us buys some and finds out. I will need two tires in about 6 months. I intend to get the Maxxis tires and write a report here. Unless someone beats me to it.
See:
http://www.maxxis.com/
I wouldn't worry so much about a little tire exposure. Haven't you heard, "wider is better"!
Paul