HAHAHAHA I almost just caffienated my nostrils when I saw that picture!!!
Gizmoman! I feel exactly the same about my trip up the grapevine! I shutter when I think about what I must have done to this poor engine when I was forcing it up the hill!!! Oh lord....
I want my car to be like the Mach 5 with all the extra gauges, switches and gadgets!
If I want to be an efficient therapist, I need my car to tell me how it
really feels

I do think a truth light would be a simple modification...I just gotta look at a diagram and figure out which wire to snip and extend to the switched side of the HD relay. Gizmo, 4 LED's wouldn't be necessary but if you DID run multiple relays like you were saying, you would need to tap into the switched side of both relays. A single LED wouldn't show you WHICH relay was stuck on, but if either was stuck in the first place, you would need to break out real tools to diagnose it anyways!