The screw you see in the picture to the left of the terminal block, is a common ground. I took a ground directly from the alternator to that screw and everything else (lights and relays) is grounded to that screw.
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
