The Galaxie back seat is HUGE.
I just bought another Mustang last night.
It is a 1967 GTA Convertible. Candy Apple red with parchment interior (bench front seat) and white top.
I'll go out and measure the seats to compare.
I know the Galaxie could fit 8 adults (4 in front, 4 in back) if you had to.
I just measured. The 67 Mustang back seat is 45" across and 15" deep.
The Galaxie is 62" across and 18" deep. That is a big difference. Also the Galaxie has at least twice the leg room and the seats are "deeper" and taller.
It is a blast. I have been driving it daily this week. It is really a fun cruiser.
Here is a link to my new ad on cars on line.
http://www.cars-on-line.com/25818.html
Have a great day.
Scott