Jeff,
I have a '95. I used the cup holder (AKA cup spiller) opening to install a switch panel. One of the switches is a push button for the OD. That freed up the hole where the stock OD button was for an EGT/boost gauge. I got it from Geno's which included a piece of plastic to fit the hole. I have a Prodigy brake controller in the hole where the ash tray was. My cup holder is a cup smoothy from Geno's. I have mounted three more gauges below the dash in front of the cup smoothy. They are fuel pressure, transmission temp, and fuel level gauge for my extra tank. I found some black 1/4" thick plastic at a plastic shop that looks good for the switch panel, the trim around the brake controller, and made a mount for the three gauges from it. The black plastic is ABS so pipe glue will work to join the pieces that make up the panel. Easy to work with a drill, file, and dremel belt/disk sander. I don't have any pictures of the setup yet. The display side of the plastic is kind of a crinkle finish.