If you get some new rear spring isolators that should do the trick. I had a sagging problem with my '88 GT and it turned out the isolators were bad. If new ones don't do the trick, maybe you can double them up... just a thought...
Good luck!
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Joe!
1988 GT, 167,000 miles!!! 13.58@105mph Check out my listing!
Click here! Or my website:
www.joe4speed.com
99 Ninja ZX-6R:10.32@135mph!
1993 Olds Eighty Eight LSS 16.40@88.8mph