Denise,
I was fairly pleased with the way my dash evolved. I kept my reproduction gauges and had Palo Alto-whatever-they-call-themselves, refurbish and reface them. (I had them copy a carrera 8000rpm tach face)
I took the approach that my car was still just a few years old(back in the day) and did what I recalled was being done, then. In the pic I had put the equipment below the dash and painted it out so it was less noticeable (not out of harm's way to prying eyes with evil intent).
As much as I dislike the aftermarket three-face add-on gauges, I got a VDO set and attached it under the radio. As for the clock, I just watched eBay until I saw a dashboard mount clock from the fifties and screwed it in place. The picture has the Heuer timer showing a little too prominently, but it was chromes.
In all, my cockpit was a little busy but my premise was to have a supposedly multi-function old-time racer; hula dance optional. If hubby wants to work in fibreglas, as pointed out earlier in the thread, it is very forgiving and you can redesign your gauge lay-out to incorporate vents, different sized gauges, even a period box-like holder for a radio as some of the folks have done to their cars.
As one of my friends say, "Fun with cars!"