Two problem areas to be aware of.

The SU's are prone to vapor lock. A blower with a vent system was installed on some cars to help keep them cool. If your car does not have one then there are plenty of them out there to source one from.

The water pumps go about every 45,000 miles but they are cheap and easy to replace. The life of the water pump might have been increased at some point during the last 40 years so that may no longer be a problem.