Is this for your 50 Deluxe cab? The paint depends on your budget and how high your standards are.
The 50 had a tan dash that was flat.
The grille would of been an off white.
The doors are body color from the door weatherstrip out and the inside of the door was tan.
Sandblasting the frame is a good idea. I like powder coat myself but I'm getting lazy.
There are some good pics on this site to get an idea what is correct. Search for original paint.