I may have previously posted about the clunking noise ever since I installed a Goodparts spacer to even off the spring. I had another TR6 owner bounce the rear up and down and he thought it was a cracked frame due to the Roadster Factory tube shock conversion. I did have the frame welded near the differential mount when I bought this car 20 years ago. Is this a common problem? Is it easily fixed? Should I go back to the lever shocks? Is it dangerous to drive?