Hi H2S,
Thank you for your concerns about CDI module grounding to the sheet metal electrical panel.
While the original CDI box used this point for ground, after the CIS to ITB EFI conversion the original CDI module was replaced by an MSD CDI module and the main ground for it is taken at the grounding stud on the chassis next to the transmission shift rod tunnel (see photo #3 below).
The main ground for the rest of the EFI system is taken from the grounding stud on the inside of the chassis beneath the fuel filter (see photo #2 below) - also note the webbed ground strap directly beneath my new black ground wire.
The ground wires I was referring to in the photo below (photo #1) are for 2 low current circuits and not the ground for the MSD CDI module - note the webbed ground strap beneath my ground wires which is originates at the chassis ground stub in photo #2).
Photo #1:
Photo #2:
Photo #3:
