Thanks guys. I have heard of the rear seat belt upgrades for 97 models, but looks like they changed the whole rear seat setup. The "bucket seats" style that I referred to is what is shown in the TSB illustrations. They call it "contoured" seating for all the 97 cars, and retain the stitch differentiation between models. I guess at some point the 96 USA long wheelbase models started to be built with the new contoured rear seat, replacing the "slab" bench seat that has the inner trim stitching extend all the way across the seat, top and bottom. Lots of small differences and market variations in this area throughout the run.

Then there are the Daimlers with their reclining rear genuine bucket seats and center console. Love those.