You have to remember that there was a lot of material from the original "SMiLE" sessions that didn't have lyrics, vocals or both. "Do You Like Worms (Plymouth Rock Roll Over) did not have the vocal line "Waving From The Ocean Liner" till Brian Wilson remembered it and added it to the 2004 version. Also The muical bridge to "Surf's Up" was only a snippet of a piano motif. It was used for the 2004 vresion. After "Mrs. O'Learly's Cow" there is the vocal line "IS it hot as hell in here, or is it me?" That was new lyrics by Van Dyke Parks to bridge into "Blue Hawaii". The album was always intended as a single album by Capitol and Brian Wilson.
SMiLE probaly would have been the standard american lp length of 11-12 tunes, 6 per side. most likely 1/3 of what is considered the smile tracklisting today probably wouldnt have been on a 1967 lp of it.
This may sound crazy to some but I was listening to the 2011 release of "Smile", and concluded, if you wanted to fit it all on one record which lasts, roughly 45 minutes, I would cut, "Surf's Up", and put in "You're Welcome" as the opener or closer of side two maybe? Because, imo "Surf's Up", while not a bad song, could have been used as like the B-side to "Heroes and Villains" single, and THEN put "You're Welcome" like at the beginning of side two because it is kind of a an opener and a closer, "You're welcome to come", like join us in the rest of this journey. I don't know. I think Brian Wilson really liked "Surf's Up" and didn't want to cut it, but sometimes you just have to edit. And also I think "Surf's Up" is somewhat out of place with the rest of the album, and that he made the point, "Child is father of the man", by the end of the song, "Child is the Father of The Man". And "Surf's Up" kind of ruins the flow of the album imo. Of course with modern technology, I can just, re-sequence the songs, and take out "Surf's Up" and listen to it that way. It makes me wonder if this is what Brian Wilson ran into, when he made this album. How to make all the puzzle pieces fit in roughly 45 min? If you make it an extended lp, you lose sound quality, but if you put it at 45 min., you have to cut one of the tracks. But as the Beach Boys later album put it, hindsight is "20/20".