I'm running all LED's in my Darts dash, I tried the LED replacement for 194's and wasn't impressed so I built a string of LED's and ran it to the fusebox,

For mounting I used the stock plastic bulb holder that I drilled a hole thru the back for the wire to pass thru and glued the LED in with some silicone. About the only downside is you lose the dimming feature but the lighting is much better and it doesn't pull as many amps.