from autolumination, I used their #192 and #74, not 78 because I couldn't find the 78's but they fit just fine..
1. the issue with that dash is the film they use on the back of the face of the gauges, that is the limiting factor..
A. since it's blue I went with a white bulb and will still show blue (beter than green since is easier on the eyes)
B. as far as the indicators go, some are yellow and some are red and there is nothing you can do to change the color unles you take the whole thing apart and change the silk screen
2. if your truck is equip with a PATS system be carefull not to disconect the instrument panel as you probably wont get the truck to start after that.
A. when you disable the pats before disconecting the battery and discharging the capacitor it has.. it a security issue and the PCM will disable the vehicle and that is a dealer program item.
3. as for the AC contol panel it also uses the 194's (2)
4. I don't have a 4x4 so dont have any experience with that.
all the warning lights on the instrumetn panel are #74(there are like 16 of this ones) all illumination lights are 194's (only 5 of this)
5. I haven't move to the back controls yet.. So i guess wil find out in a couple more weeks since I've been busy messing with the busas to bring them up to speed
Good luck