The willys has 31 x 14 x15 Hoosier slicks. Air 9 -11 lbs. It has a four link. Mustang front end. No sag in suspension. Launches straight. problem is that when I was running mid 11 and 124 mph it was perfect. I repowered (406) and ran 10.4. Problem was I was doing major wheelies. I put the top bars on four link down a hole and scaled it, and had wheelie bars put on. Unfortunately the guy that put the wheelie bars screwed up and the pulled the back tires off the ground at launch. I removed them. My front end was more controllable at launch but then I started getting wandering at the top. I intend on putting my four link back where it was, but I am also repowering with a 572/620 hp which will put me into the 9 with speeds in the 130 -140 mph range. I have talked to other people with same car and they are running wings at these speeds. This car actually blew over in Bakersfield about 6 years ago.