There are 2 great Magic Kingdom unsolved mysteries to me. The side by side seating at Space Mountain is one.
I'm not being argumentative here and normally I would call b.s. on something like this but I'm really conflicted on this one.
There is a book in The Art of Disney Store at the marketplace at Downtown Disney... I have thumbed through it a number of times in the last year. I don't recall the name because the book was not that good. If it was I would own it. Anyway towards the back of the book there's a page about Space Mountain in the Magic Kingdom and it essentially says little known fact: When the ride first opened the seating configuration was side by side then reconfigured. Along with a photo.
I immediately thought of person was a moron and hadn't done their research, but upon studying the photo it was indeed the Magic Kingdom. The launch pad, the costumes, the unmistakable 1975 Walt Disney World rocket.
NOT the DL 1977 rocket.
I've also read an article by George McGinnis or Marty Sklar within the last week that confirmed the configuration when they discussed the design.
I will dig it up. I didn't know I was going to have to defend this or I would have marked it.
Here is a photo from opening of Space Mountain. (Not the photo from the book which seals the argument)
Zoom in. Notice the rider in the front row is sitting completely on the left half of the rocket and seriously? is the guy climbing in going to sit in front of him without breaking his rib cage.
The jury is still out on this one I believe. It's okay to be wrong. And for good measure I will photograph the page from the book when I hit D23 next month. The photo in the book is WDW side by side seating 100%.