I wonder why The Public opted to use the Broadway libretto for their 40th Anniversary production as opposed to the Off-Broadway libretto which would have been more appropriate since that is the version that played The Public in 1967. Are you referring to last summer's concert version or this summer's revival? Either way, they most likely didn't use the 1967 version because it was
such a different show. Can you imagine waiting on line for a production of Hair only to arrive and have the show start with something other than "Aquarius"? Without songs like "The Flesh Failures" and "3-5-0-0"? Oof, that's almost a sin.
(In any case, I read that the revival book is not even the straight-up Broadway libretto but rather a "custom-made" version cobbled together by Rado and Paulus from the pieces that worked best from each of the librettos before, during, and after Broadway. But yeah, it seems closest to Broadway.)
I love listening to the 1967 recording because it's a fun (and significant) artifact, and because it includes that terrific "Dead End". But nothing beats Broadway for me. The Off-Broadway band was far inferior to the band at the Biltmore--MacDermot has mentioned this several times. The score in 1967 was thrillingly raw, certainly, but it wasn't yet the way it was meant to be heard.
While we're talking favorite Hair recordings, one of my favorites is "DisinHAIRited", a collection of songs that were cut from the Broadway production (plus new versions of a couple that made it, like "Going Down" and "Electric Blues", and songs that have found their way back into this year's revival, like "Stone Age" and "Oh Great God of Power"). It was recorded in 1969 with selected members of current and past Hair tribes, including Ragni and Rado. It's long out of print and LPs are on eBay, but there is a site where all the songs are available to listen to and download... (Not sure I can post the link. PM me if you're interested.)
"If there is going to be a restoration fee, there should also be a Renaissance fee, a Middle Ages fee and a Dark Ages fee. Someone must have men in the back room making up names, euphemisms for profit."
(Emanuel Azenberg)