I can only speak for my 1985, but the factory illumination of the instrument-panel is much too dark, even with brand-new clear 194 bulbs.
For years, I had to shine a flash-light to see how much fuel I had.
I installed a couple of those 3-on-a-bar blue LED spot-lights like one sees in Walmart and such places; and, now I can see the gauges really well.
The plastic base that these little spot-lights are attached to has peel-n-stick backing.
I just stuck one on each side of the column to that flat platform immediately underneath the gauges.
These come with a lighter-plug attached that also contains the brains of the LED system, so DON'T cut off the plug.
What I did instead was to mount a hidden double-plug-outlet that powers up when the dash-lights come ON.
The only color I have ever seen these come in is blue.
No longer do I have to use a flash-light to read the gauges.