Instrument bulb lighting...still dim

66 CUDA said
I had the same problem with my 66, I bought a new switch from Oreilly's and replaced the bulbs with some of Slant six Dans 2886X's and now my gauges light up real nice and bright.
Bob

That bulb is correct for pre 67 bulb sockets. Sylvania 2825 would be the optional bulb for 67 and later.