Pman1961 I know you are looking for a street ride but adding this much grip and traction will cause these issues. I thought the same as you after swapping out from BFG to Pilots. Rip was hell of an improvement. Down side was driving and making turns. This was not just on the track but where I tested the car on my county roads. They are concrete. The steering feedback was poor. The tires where heat cycled before adding them on the car. This is important with new tires to drive easy until you have 5-10 cycles on them. The info I had learned before Run&gun and after, a 1 hour meeting with Morris did a basic suspension course for our cars. We learned that 98% of us had set them up wrong, me too. After learning what the car did we know where to change and fix the problem. A video is the best learning tool you will have. Once the car is re setup and balanced, you will not believe how good the car really handles without killing the ride. Would also recommend a road race seat for the driver. It's more comfortable and keeps your butt in place. it's alot better than the correct seat. 4 bolts and you have it swapped if you want to go to a show or gip up a canyon road. You already have the 5 point harness in the car? If not buy one. Hey good luck. looking forward to how the car drives after the new tires are on it. watch out for rubbing.
Rick L.