overspeed dummy light on

[wingnut-SKO]

i have a 84 gmc bluebird with a 366 tall block i hooked a tach up to it and a light on the dash came on that said overspeed so i disconnected the tach and the light is still on there was a wire in the tach spot on the distributor all ready so i cut it and tied the tach to it and the tach worked but this overspeed light came on so i disconnected the tach and put every thing back to the way it was and the lights still on does anyone know if there is a reset for this or will it effect my motor
(slow it down by cutting out cylinders) or should i not worry about it and just take the bulb out,dont plan on running the bus over 60mph anyways can anyone help