Ok. I got some LEDs from superbrightleds.com and they work great! Drop in fit, no modding of the openings or anything. The indicator lights (Oil, Neutral, High Beam, Turn) I got are too bright now though and I'm ordering some with less powerful output for them. The tach speedometer lights however are perfect!
Here are the ones I got for the speedometer, odometer, and tachometer:
http://www.superbrightleds.com/moreinfo/ba9s-ba7s/ba9s-led-bulb-4-led/6/58/You need 5 of these. 2 in each gauge, and 1 in the odometer chamber. Cool White, 90 degree, 12v.
The other lights are the same type 4 LED bulbs, but they are colored to match the application (Oil=red, Neutral=green, etc) also I got them with 32 degree angle output. Blindingly bright! Ouch!
And here they are shining on the ceiling of my garage!