I do realise that you have probably already have this client in, but for anyone with a similar problem in the future here is my response:
The first place I would begin is by researching the hair styles of some of the bigger names of the 60s: Ursula andress, jane asher, shirley bassey, honor blackman, cher, petula clark, patsy cline, patty duke, faye dunaway, mia farrow, peggy fleming, jane fonda, aretha franklin, goldie hawn, audrey hepburn, judy jetson, janet leigh, lulu, marilyn monroe, elizabeth montgomery, stefanie powers, priscilla presley, nancy sinatra, dusty springfield, elizabeth taylor, twiggy, dionne warwick, natalie wood.
I recently had to style my hair for a hairspray themed party and took my look from "hairspray" the 2007 movie for some style ideas, there are some great hair styles in this movie. :biggrin:
The 60s were a time of dyed, teased and big hair.