My first thought was you had to much spring rate. I had the same problem, I was over sprung. Reduced the rate (replaced coil overs too) and it changed everything. I have a 31 Ford Coupe all steel and I run QA1's with 110 lbs and 130 lbs springs. I've tested with both and feel the 130 lbs gives the same ride with a better appearance on the coil over. The 110 lbs requires to much preload. TCI suggested 300 lbs springs, this was back in 94 mind you when I didn't know what I was doing, let me tell ya ouch and bounce, bounce, bounce!

Keith...