'69 doors & door panels are different than '70's. On a '69 you squeeze the recessed door handle down in the plastic cupped area. Its a novel feature for a '69.
Molded console style GP dash asms interchange between '69-72. Unfortunately, not as easy to properly remove as one out of a '69-72 LeMans or GTO. On a GP, after the seats, column, console, & radio are out, windshield comes out, then molded dash assembly. The clips on the leading edge are a pain.
Colors combo's.. If the car is originally midnight green with black top & black buckets it will be VERY sharp restored, most Pontiac guys would be hesitant to change those colors. There were 3 greens for '69, could safely say most of us are not as endeared with the '69 limelight green on '69 GP's or Palisade green on a '70 GP.
Had in mid 90's a Black '70 model J 455 with gauges, tilt, & partial leather interior. Buckets were gone
Was going to cost a small fortune to restore the front & rear leather seats. Ended up leaving here after hauled in '69 428HO project car.