Camshaft replaced at 193000km.
Gas tank rusted out at 254000km.
Alternator replaced 449000km.
Headliner began falling off after 25 years of ownership.
Needed to overhaul rear brake cylinders at 440000Km.
Air conditioner compressor (A4) replaced at 392000Km.
The car still rides well after 30 salty Canadian winters.
No bodywork required when repainted in 1998. Still no rusting as of Feb/2008.
Pinging was removed in 1992 with the installation of an adjustable distributor vacuum modulator.
Original 4 barrel carb is still running well, with only a replacement power piston installed in 1991.
I agree with this survey very much. Car very reliable and still a head turner after 30 years. Needed minor body work, and suspension work at 200000 km pretty good for another 30 year old Canadian Impala. Long live the box Chevy's.