They seem inexpensive enough, but I really want to integrate it into the dash of my 77. Oddly enough, there's an almost appropriate looking space on the far right side, right of the glove box. Has anyone drilled through the dash front? ... and, am I apt to screw up the vinyl? I'm sqeamish about causing a tear. Is there any substantial obstruction behind there? I saw a Sunpro with a black face dial for 15 bucks at autozone, which doesn't look bad!