[RWebb]

big red button light is likely Emerg. Flashers

toggle switch under dash says car has been messed with...

intermittent light on while driving could be bad gnds, bad wire rubbing, of diodes failing in voltage regulator

silver button gauge says longhood but does not say which year or if it is the right year gauge for the car...

I know the tach electricals changed about '70/71 but not what else changed then

- color wiring diagrams are on here somewhere, so the fix is just a matter of time & effort