Well to start the only major thing that has gone wrong was the radiator, it leaked a drop every day or so, so it wasn't a major problem, and regular maintenance things like brakes, plugs, wire, and belts, etc. My uncle owned it and that was the only thing that he had to do.
I am getting so performance items for it. Even though it really isn't a performance car with the V6.
I've gotten a dual exhaust with glass-packs, spark plugs in the tips, K &N air filter, Rally II wheels, and air bag suspension.
Its got the Buick-built 231 V-6?! that's pretty rare most of these 88s (and there corprate cousins) were orderd with the optional Oldsmobile-built 307 V-8 (which had desended from the '49 "Rocket")