Mods made by P.O. What do I have with this engine bay harness?

The only existing holes that the replacement vreg line up with put it here
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Judging from the blue 74 above (which is exactly the look I'm going for) the vreg was mounted on what looks like a 8" long tin box that was bolted to the verticle part of the inner fender below the fender bolts. The holes can be seen here
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I'm pretty sure the ignition box goes where the vreg is sitting now. I am waiting for a used ignition box to ship to me that I'll hollow out to hide the HEI module. Once it's here I can see if it matches up with the holes.

The only place the starter relay lines up with existing holes is here. Kind of close to the battery tray, but I thinks this is right.
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