You need to correct the concert summary for the new "The Band, Los Angeles Forum - 2/14/74" concert you posted this week. The Band didn't back Dylan at his infamous Newport Folk Festival electric debut. It was a pickup band made up of Al Kooper, three members of the Paul
Butterfield Blues Band: guitarist Mike Bloomfield, drummer Sam Lay, and bassist Jerome Arnold, and pianist Barry Goldberg. Even for the two succeeding electric concerts at Forest Hills and the Hollywood Bowl, only part of the band,  Robbie Robertson and Levon Helm, joined Al Kooper and Harvey Brooks. See the information at the following links:

http://campus.queens.edu/depts/english/dylan_goes_electric_the_newport_.htm

http://en.wikipedia.org/wiki/Bob_Dylan