Sean as far as a track car I had my car at Road America 2009 but didn't push it, I don't have the skills necessary to handle that amount of brute power. I use to track my twin turbo Ferrrai, it was set up for racing and is a lot of fun, but when boost comes up it doesn't blow the rear tires out, the GT40 even with avons is a hand full. In 2008 another forum member an I were at Morroso in South Florida where I was tracking the Ferrari, another friend was there with his CAV GT40 powered by KC all aluminum 427, making at least 550Hp. We had just completed the morning run and had lunch, we were sitting at the picnic tables under some trees and the driver for the GT40 (who had his competition license) asked if I wanted to go for a ride next go around and I declined and said I was going to drive the Ferrari but thanks, then an owner of a Pantera from back east said he would ride with him for the session. The GT40 was right hand drive so the passenger of course was on the left. The CAV had fuel tanks just as we have but the left hand side was the only tank with fuel, the right hand side (drivers side) had purposely been left empty to offset weight, well as I was suiting up at the starting area the GT40 came around a flat corner just before the pits and hammered it, the left rear wheel was off the track about half was on some pea gravel and the car blew out the rear tires lost control and slid sideways into a concrete flagging podium right in front of our eyes, it exploded from the impact and the hood took off 50 feet into the air. The driver had to be cut out of the car, the roll bar had saved his life but he was in bad condition, after spending a couple weeks in ICU he stayed at our home in the Florida Keys getting strength enough to make the trip back to Maryland in the back of a van, he had more pins and cables coming out of him than Iron Man. The passenger hit the driver so hard it broke 3 of his ribs. Just think there was by the grace of God no fuel in the right hand tank or it would have been over. After that I lost my nerve and really wasn't that good anyway so I do not tract race. Open road racing is totally different, driving your car at 130 MPH for 118 miles with 100 corners is an endurance test and also a test of skill. I enjoy open road racing.
Out of respect for my friends I have left their names out and think I've made my point about over powered cars, if he would have had a small block 302 based motor I'm certain this would not have happen. Here is a picture of me and the 208 twin turbo at Homestead.