timing degrees

[truckin 79]

Hey fankyjoet you have to test the wire that plugs into the HEI cap. The wire that is running from the factory harness. A good way to tell if it is a resistor wire from GM is if it has a cloth covering the wire running to HEI. Also you can just test wire with a volt meter and turn key to on position and check voltage. So you need to check the wire leading to HEI, if you are not getting 12v to HEI you will have very weak voltage at spark plugs