Well all, getting back to it now that I've been back in Florida for almost two weeks...
... headers went away for ceramic coating, which I should receive back in eight or so days, as well as some sprucing up and clear powder coating of the air intake manifold and valve cover.
I managed to get all the rest of the old firewall pad off, and I'm noticing a small bit of surface rust beneath the brake fluid reservoir and all that. Best to take care of that now. Tough to see in this photo, but I have all my nice parts all laid out. Today, I am replacing the crusty (and original) felt around the windows, detailing the entire rather-dusty exterior, and replacing mismatched fasteners in the interior.