the one bit that is bound to be missing is the front fender mud shield that prevents mud from being slung towards the door hinge area, There were 2 kinds one was a metal shield and one was plastic - very similar to the corolla mud shields. The edges of them were stuck with rubber ribbon sealer that is set with heat, the fender tops are also set with that compound to prevent water from being trapped in there and rusting everything out.
The hidden area of the fenders originally had a very thick gray undercoating which usually melted away as "sarviss teyshun" sprayed oil in there.
The car is in pretty decent condition - preserve it with some cavity wax in the doors, fenders, bonnet and bootlid. Before you get the car finished, test fit all body panels and make sure they are smooth as glass and the panel gaps are dead on perfect, use a vernier caliper and even some straight edge (small granite or marble piece) to check.