Guy in our local club has a 40 that color, seems to be stock (inside the fenders and glove box match). Only have a video of his truck (which mud won't let me insert ). Here's a link to it:
Not sure what year it is, has parts from many years . The dash has the early handle clamps w/o a pad and safety strap eyes. Hope that helps a little -
that looks like my 78, which was cygnus white. cygnus does have a yellowish look to it.