GM used 12 gauge wire to HEI, this will require at least that same size wire feeding the key switch.
I installed a Tom Langdon S10 HEI with 10 gauge wire, but I used a Bosch style relay, so high voltage did not go to the ignition switch.
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum
