I GOT A 59 GMC THE HEADLIGHTS TAIL LIGHTS SAY 12 VOLT BUT WHEN I CONNECT THE BATTERY THE COIL GETS HOT ITS BEEN MANY YEARS SINCE I TOUCHED ONE OF THESE CRITTERS. CANT REMEMBER **** ( THANK YA )x(
Dont quote me with certainty on this but I do believe most all auto manufacturers were running 12 volt systems by 1959. Tim
All 55 2nd series and up are 12 volt. If your coil is heating up, might be a problem with your ignition resistor on the firewall or voltage regulator if you still have one. Dr Mike