Re: X22 COPO
I looked at my unrestored big block ZL2 equipped car firewall and there are no holes where you circled yellow for wiring clip, the relay hole shows no indication of the star washer marks, the ground wire (green circle) is much higher than the factory ground location on my car. There seems to be another extra small hole between the blue circled relay hole and green circled ground wire hole.
The factory firewall has a number of dimples in the steel. The blue and yellow circled holes look to use one of the dimples (blue circle) and may just be holes for an aftermarket coil/ignition box that was firewall mounted. I've seen these paired holes many times in this area of the firewall.
If Jerry is prepared to verify this as a Copo by some extra firewall holes and hard to see crayon markings then by all means get his blessings on paper.
Good luck in your continued research on this car.
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