Yeah, my car used to pull the driver side front tire over a foot off the ground and the passenger side would only come off the ground a few inches....major twisting. The main reason (I believe) was the weak original springs that I was using. This was one of the reasons I switched to the full Caltrac set up, also thinking it would go faster....well, it now leaves level with both tires a few inches off the ground...but it is still not any faster :-/ Here is a link to how it looks now for comparison.
http://www.motolenzphotos.com/dragracing/Mopar-Cut/P2Street-Trophy/IMG_7535.JPG