Close to pulling the trigger... any specifics to watch for??

Look for: the bottoms of the rear quarter panels rusted out along with the panel behind it called the trunk drop off, Rust in the rear wheelwell lips, rust In the bottom rear of the front fenders (called the dogleg), Rust in the bottom of the cowl underneath the dash where the fresh air vents are located, rust in the front floors around gas pedal and frame rails.

Also rust at base of windshield pillar. B&T shaft is fine, make sure the seal is still intact. They will live forever if lubed and are plenty strong. People change them out because they change their trans from cable to later lever trans and lose the 4 bolt flange. Mine was a CA car and it even has slight rust in the 'dogleg'. Speedo cable is kinda unique. Front headlight trim rings are expensive and are usually dinged up.
thanks guys for the tips on a couple areas to look for as far as rust... like bottom of the cowl