Crosby, Stills, Nash and Young have pushed back the release date of their 1974 live album. A week after announcing it would be out August 23rd, Graham Nash told us exclusively Thursday night at the opening of his photo and art exhibit in New York City that it will now be out next spring.

"In investigating the tapes I keep finding these things that I can't leave off," says Nash, "so it's in flux right now...and I don't want to rush things because I have a deadline of August 23rd." And, Nash adds that 2014 is the 40th anniversary of that reunion tour from which these songs were taken, "so it's perfect and you're the first to know."

Among the recently discovered gems is a one-minute-and-10-second song from Neil Young about President Nixon, which Nash says is "killer."

In addition to the opening of his photo and art exhibit at the Morrison Hotel Gallery in New York's Soho district, Nash -- along with David Crosby and Stephen Stills -- is rehearsing with Wynton Marsalis and the Jazz at Lincoln Center Orchestra for their two shows next week at Lincoln Center.