First thing I noticed when I looked for reference pics is that this is the interior for a '65, not a '66.
That's OK though as it's just a quickie curbside build.
I just sprayed everything the same dark red I used on the body, flocked the floor and did some detailing with foil and flat black paint on the dash, a bit of foil on the console and sided of the seats and silver paint on the rest of the interior.
It's all glued in the body now and I'm working on a flat sheet chassis. Should have pics of the finished car up tomorrow evening.