Matt, that's what I was worried about, what lay in store for me under the dash pad. A few things I haven't been lucky with (that trans mount is a big to-do for this spring, and the floorboards, but those is pretty much par for the course), but other items I thought might surprise me with damage, haven't been an issue.
I figured I would work on the coil for a bit more today, here's some pics for progress.
It should eventually look like the image below. I got the Greece coil holder, I thought it looked pretty sharp. Trial fitment went fine, no issues there.

Once I took reference pictures, and unhooked the wires on the back of the ignition switch, I undid the bolts to the old coil. I then pulled the whole assembly out through the coil hole in the firewall.

I thought I would try something that I had seen on a Facebook page, that used the armored cable from the ignition switch, to the new coil. I thought if I could keep the ignition switch stock, that might save me some time in the long run. If it doesn't, then this can be a first stage to something further on.
I drilled out the weld points of the coil cup to the coil itself:

Once that was done, I had to massage the flange away from the coil. I could have used a bigger drill bit to completely get rid of the small spot welds, but I didn't want to go too big right off the hop.

Ta-dah! The goal is in sight. As you can see, a few of the holes could have used a bigger bit to fully drill them out. Since I didn't know exactly how the cup was attached to the coil, I use a bit extra muscle to separate the two parts. I plan to initially de-solder the connection and attached the same gauge of wire to extend the 12V switched power to the '+' side of the new coil. If that proves to be too painful, I'll just cut the wire, there is enough sticking out to attach a wire to.
I didn't think too hard about essentially wrecking the coil, it's long past its life, and with technology getting better, I think it makes sense to upgrade to a new coil. I wanted to save the armored cover in any case. My initial thought is that I might try to attach (maybe epoxy) the cup onto the bottom of the chrome coil holder, and route the cable through a newly grommeted hole near the coil to keep it as clean as possible. I'lll mull this idea over for a bit, maybe crawl the web for some ideas.
