554 is custom trim option - stainless trim on the pedals, door grab bar, deluxe door panels with molded armrests, etc.

Indeed it does show 269 as Custom Strato Bench. I have never seen another configured with bench and floor shift from the factory.

You can have replacement upholstery made by PUI. I had two sets of non-Comfortweave deluxe dark turquoise seat covers made for a pair of very early '68 convertibles. They do very nice work.