Terry:
I've seen a few cars, usually CMC's although the CMC body is pretty much the same as a VS, with additional 2" gauges in the dash panel and yes, they just fit. My suggestion would be to photocopy your gauge faces and cut them out full-size. Cut out a paper template for the lower dash where you want to place the gauges and tape it to the dash, then tape your paper gauge faces to the template. You'll be able to move them around and get a feel for placement.
Once you have them where it makes the most sense, use a straight-edge and draw a horizontal line across the centers of all of the gauge faces and your paper template, and a vertical line across the center of each and use the crosshairs as your drill points. Use a push-punch through the paper to dimple the fiberglass at the center of each gauge and then use an appropriate-sized hole saw ( Kobalt, Husky, Craftsman, it doesn't matter....they cut either wood or fiberglass) using the dimple as a guide and cut out the holes. Use a vacuum cleaner close to the saw while cutting to reduce dust (just tape it to the dash) and a dust mask is a must. Once the drill bit goes through, try to keep the hole saw as true to the surface as you can, run the RPM's down to a moderate speed and apply moderate pressure until it's well into the material and just hold steady until it clears the hole.
Slow and steady for a nice, clean hole. Good luck, and you'll do fine.