Ignition Control Module problem

Doesn't matter that much. Main thing is that you get some "for sure" electrical conductivity. I've even just scraped around the bolt holes good with a screwdriver. Sand or scrape the rear of the box around the bolt holes. You can put the washers just under the bolts, but they probably work better between the box and the firewall.

This thing is a poor design. yeh!! LOL. I know they worked, back then, but electrical components should NOT be grounded via the mounting bolts, especially where subject to rust and corrosion.