'59 and '60 Buicks
That '59 had the six-way seat. The problem with so many of those cars was the angle of the seat back. And no, only Rambler had adjustable seat backs. But--my father owned a '60 Classic wagon as a 'work' car, and it verified what the car mags said back then--the steps were so few that only the most upright position was suitable for driving. If anyone is curious, visit Jay Leno's YouTube channel and check him out driving his Olds coupe from these years.
There were two four-door designs for '59 and '60 for all full sized GM's as they all shared the same inner body, from Chevy through Cadillac.
The more popular roofline was the six-window with a gradually sloping rear window. The one that collectors love now is the 'flat top', with the wraparound rear window. As I recall, though, only the Electra and Cadillac offered a choice in hardtops, for Chevy/Pontiac/Olds only offered the 'flat top'.
Like the two-door hardtop, unfortunately, the headroom was wanting; the more traditional-looking six-window hardtop had more than an extra inch of needed headroom. My relatives' 1959 had the 6-way seat (it was loaded) but, like my parents' 1960 Bonneville, had the 'flat top'.
GM continued its choice of hardtop sedan roofs for the Buick, Olds and Cadillac through 1964. The four-window was considered more 'youthful' looking. However, the six-window was not only much easier to get in and out of in the back seat, but the seat was able to be moved back further, so they also had more leg room.
My aunt Isabelle had a white '60 SDV 'flat top' with a black-and-white cloth and leather interior. However, she was only 5'5" so the lack of headroom didn't bother her at all. As a small child, I was at the grocery store with her once when she accidentally backed into the side of a pickup's bed and poked a hole in the metal with the fin on the back. That guy was sure mad! I remember it well...
