You might get a better response if you let us know what gauges and how you use your boat (racing,cruising, combo...). On the surface it sounds like a raceing question. If it's a wiring question then what kind of bridge mounting are you thinking of?

Without intending any offense, Bill -- times have changed.  I looked at one late 80's C36 that had the nav gauges over the companionway, but #1 - they looked intrusive and the mounting feet interfered with the control lines running under the traveler/dodger and, #2 - with my aging eyesight I'd have needed to use the binoculars to read them (plus the wiring required covering on the ceiling inside).

Having the gauges mounted 6 to 10 feet away from the steering position was a holdover from small, tiller-steered sailboats that had no other place to put them.  As soon as you have passengers they block the gauges.  The solution in the late 80's was to mount them over the companionway, but as boat got larger and larger (our club's docks/fingers were built in 1978 mostly to accommodate craft no longer than 26 feet as larger boats were rare back then - now the little boats are rare!), just as in cars and aircraft, the gauges moved back to the steering position where the helmsman could see and control everything within arms' length and eyesight.  Navpods became the go-to solution.

Where are we now?  Now all the gauges are on a single large tablet touchscreen mounted in a waterproof housing where the Navpod used to be and they are gradually all becoming wireless via Bluetooth or WiFi.  The gauges can be shuffled around on the touchscreen and enlarged or shrunken as desired.  Voice command control is a few years away.

Where are we going next?  Heads up display in a pair of Bluetooth-enabled glasses.  No need to look down, all the gauges are in line of sight wherever the helmsman (helmsperson) is looking and either voice commands or gestures picked up by forward-looking micro video cameras will squeeze the size of the gauges up or down or shuffle their placement around within your field of view.  Eventually every crew member will be able to wear a pair of glasses and see what the helmsperson is seeing, including an overhead view of where their boat is in relation to all other boats in the race and the marks/finish line, the data being furnished by GPS signals from every boat and a drone being flown from the Committee Boat.   

So, Bill, you can go to the trouble and expense of figuring out a mounting solution and re-wiring, but I suspect that, taking all that hassle into account, the Navpod, even with the set of wires required to be fed under the belly of the beast and up through the pedestal, is a better and far more 'elegant' solution, or, if you are willing to spring for the ultimate futuristic solution, an interactive screen, perhaps even with all Bluetooth-enabled wireless instruments ($$$).  The heads-up glasses are still 'in the pipeline', but I suspect we'll see them in another few years.

The older solution will likely be much cheaper, especially if you can find a second-hand or off the shelf solution, but I added an open-jawed stainless steel "T" bracket on my pedestal with a short piece of 1" pipe, a 90 degree and another piece of 1" pipe with a rubber bicycle handlebar holder for my smartphone and, using Navionics and an old Garmin GMI 10 receiver showing wind and depth (plus a USB charging port I installed at the pedestal), I'm good to go.