Gas or diesel? Where are you and the car located?

In the rust belt, they are prone to rocker-panel rust aound the jack points, the ACC dies if there is a bad auxiliary pump, A/C systems can leak, auto-trans is notorious for failure also eventually, depends on the engine and useage. Early non-tilt sunroofs are less problematic than the mid-'87-up tilt & slide.

The 602 heads are known for weakness/cracking.

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Gone to the dark side

- Jeff