[TimNiceBut]

It'll depend a little if the car lived in a damp climate, I've seen some interesting rust on SCs and Carrera 3.2s in the UK. The galvanized body does hold up a lot better but after 20-odd to 30 years, there's still a chance for rust.

As a starting point I'd check the windshield surround carefully, possibly the rear window area, too. Rockers, kidney bowls (especially as that's not a cheap repair), front suspension pan from underneath the car and inside, the area around the battery (especially if it's boiled a battery at some point).