HEI EXTERNAL coil wiring help


1985 BJ73 RHD
Jun 4, 2005
West Frankfort Illinois
Can anyone tell me or point me in the right direction on the external coil version of the GM HEI unit? I have searched the forums and only found the internal coil mentioned. In particular, I have an HEI with the coil external. I will be picking up my plug wires, cap coil and rotor tomorrow. I have already swapped the gear. I know taht I need to use a relay to supply the 12v to the system, I am just not sure where in the "external" version I supply the ground and 12V.

Thanks and have a great day!!

Mike :cheers:
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