Stop in for a cup of coffee

ZMan67S said
That wasn't a fresh engine. Battery caps are green and very dirty.
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Did you see in the summary about the original article its mentioned that the car was driven through mountains and a torrential rainstorm? That would explain the condition.
ZMan67S said
Those are the two I just got from Vans Auto L bracket shares with the wire bracket both $14.00 for A-Body big block.
Bronze metal color is painted engine color.

L bracket goes on first. Their part number CHZENG053
View attachment 1715367583
CHZENG039
View attachment 1715367584
Bolts to left front exhaust manifold stud on top of “L” bracket. Holds all left side wires except for #7. Always used in conjunction with “L” bracket.
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That's second one looks different than the test car. huh-gif.gif
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upload_2019-7-22_13-52-53.png

Maybe your buddy John will know. In the mean time keep hunting photos.
Doesn't even look like a wire can be run to the inside holder. ???

I like the part number hand written on the engine bracket.