I can tell you a little about the coupes.
rear window sil and parcel shelf (coupes have a bad habbit of rusting in that area) cheek along the bottoms of the doors, cheek in the boot around the lights etc....... i think these are the main areas
Cheek the rear window seal, because of the shape of the window water tends to build up their and can leak through
and of course cheek the numbers so you know you are getting a real GT and not just a replica
AU2 VCT XR6 Liquid Silver, Full body kit, Tickford 17's, Pacemaker Extractors, Lukey Sportz muffler and S/S Exhaust System, JR air filter....plus a few other mods!
Lest we forget: XB GS fairmont Coupe, 351c - 4sp toploader...... oh how i miss her...