Apropos of nothing, this is perfect music. Doesn't need reverb, doesn't need a high priced mixer/producer, just needs people singing, playing guitar, making real music.
And everyone who came after and sang harmony vocals should bow down and worship these guys. Who do you think The Beatles copied? And every other British Invasion group? And every other pop act since with more than one singer?
And for those California-centric folks: Yes, Brian Wilson was a fan.
Oh, and these vocals were live. Track was maybe recorded on Cathy's Clown, but All I Have To Do Is Dream is clearly live. This is how these guys sang and played, every day.
Where did they get their influences? From guys like this: