Retrieval of a factory build sheet ought to confirm 62 as the color of interior components. know I pulled 3 clean copies out of my '80 SE, before mothballing the car. With the front seats, rear seat, and door panels swapped out over time on this '78, it still should have a buildsheet copy on top of the gas tank. Crossing my fingers for you
On the ZP2 code, as it had been used, it was a an override to match stock code interiors with exterior colors that the combination would look "funky", not to combine aspects of different interiors. Having tried to do the latter with the help from zone reps on an extremely early special ordere and priority1 sold T/A, just find it hard to fathom a combination of colors between the dash and seats, something else has to be going on.