earlier Superformance models problems?

[saki302]

The early cars had nothing. The later cars had a rivet holding the bar, which can be swapped out for a bolt.

Check the upper rear shock mounts, they are known to fail, even on later cars. Cobra Valley makes a nice replacement that bolts in and does not fail.

[1795]

Within car that old, go through and check all of the bushings. It is probably time to replace them as even with low mileage, the rubber will deteriorate. Go with poly bushings instead.