I'm a huge fan of King's early stuff and had read the 800p "The Stand" half a dozen times before the 1200p version was released. I didn't notice anything in the long form that added to the story. I say his editors were right to cut it the first time.
This is an unpopular opinion, but I really think you can skip 400 pages without losing anything.
@music
Found it. Scapegoat Wax, "Girl in Aisle Ten".
I just had to throw aisle numbers into a video search long enough.
I brute forced it! :)