wiring a 350/454 with HEI

[Hank70SS]

The engine harness has a switched hot lead from key to ignition coil/HEI. Your car would have been points ignition so that wire would have been a resistive wire that drops the voltage to the coil to about 9 volts while running so the points don't burn out. An HEI can use a regular wire and run a full 12v but it needs to be switched. If it comes from the bat or alt you can't turn the car off. Wire to oil pressure sending unit, not needed to run car. Wire to wiper/washer, not needed to run car. Wire to starter solenoid to start car. Wire from starter back to coil to provide a full 12v while starting, not needed with HEI. Wire from battery to starter is not part of a harness and it's not fused, not on a 69. Forward light harness has the wiring for the voltage regulater and alternator. Main feed from battery to fuse block, power for everything but starter motor. It' s protected by a fusible link. Alt output wire also goes over to main junction near horn relay to provide power when engine run and charge battery. Alt output should run car but the output is not smooth, not a constant 12 volts. Battery helps smooth out the alt output.