looks pretty close to the 57's I've had, although I don't think the pic is actually of original, certainly not the seat .... the color names won't do you any good, but the 57 standard interior colors were "Marble Gray" [the light part] and "Charcoal" [the dark parts, including the dash top, which was flattened] - another listed interior color name was "Granite Gray"
what you need to do is find some existing original paint on the truck and get it matched .... also the "ceiling material" [headliner] was an embossed [rectangles, not like the repros] black naugahyde-like fabric [and repros are plastic] with a jute layer on back glued to the metal
Bill
