Hi Kevin,
I spent many hours on this for my 1959. Jim Forbes (occasionally seen around the bolt) convinced me that the top of the dash originally was not painted black in the TF trucks at the factory but was commonly painted black either at the dealer or by the owner early on due to the glare factor. He had a couple of original example interiors with pictures to make his point, not a black dash top in the lot!
The actual factory interior color names for my '59 is Comanche Gold Metallic (DUCO 92863) and Charcoal Gray (DUCO 73605). I was not able to find a modern paint code for the Comanche Gold, so instead I went with Jim Carter's PT 150 Silver Beige. However, I believe it is an exact match to the original Comanche Gold Metallic. As far as the Charcoal Gray, it still is in the system today and both Dupont and PPG can match it.
I believe in 1957, the lighter gray listed as Concord Gray Metallic (DUCO 91623) would the correct color for all of your interior EXCEPT, the floor, step wells, steering column, steering wheel, parking brake, and the top of your dash which should be the Charcoal Gray (DUCO 73605). You could also use Jim Carter’s PT 114 Light Gray for the light gray color if you can’t find it in the system. I hear it is a good match for the original as well.
An interesting side note, Jim Carter's gray engine paint is almost an exact match to the interior Charcoal Gray. We used a bit to touch up a small scratch for fun as the truck was headed back over to the paint shop, and when it dried, we couldn't believe how good it looked. I am not suggesting this as an alternative to the Charcoal Gray, but just thought it was a nice tidbit to share.
Here are two pages with pictures of the freshly painted interior of my truck to serve as a reference:
http://www.59apache.com/comanche.html http://www.59apache.com/bigwheel.html Also, on the first link above, note the pictures and narrative regarding the proper paint line delineations for the two colors at the doors, floor and dash. Jim Forbes posted some very good pictures of his original trucks for me to use as a guide. That was very helpful for our truck.
I hope that helps!
