Flickering or pulstating Headlights

That is still pretty high. That is nearly one volt and will cause your "normally set at 14v" regulator to charge at nearly 15V One way to "fix" this is to break the blue "ignition run" wire where it comes out of the bulkhead into the bay, use the bulkhead end to trigger a relay, and feed the underhood loads off the relay.

Whatever drop you read there (.9) ADDS to the normally 14V VR setting.

Part of what happens here, is the resistance in whatever terminal/ ignition switch) is causing this drop.........and it might be a combo of 2 or more, will show high resistance, cause a drop under load, the VR senses "low" and charges higher. Then the resistance "arcs across" and makes "better" and the voltage surges. This can repeat over and over.

Another cause is a "loop" such as poor grounding. I like to install a big ground jumper between engine and firewall. One way to do this is to look at your pass side front head. Those same boltholes are unused on the REAR of the left head. Take an "eye to eye" (starter) cable about a foot long, bolt to the rear of the head with a short bolt, and to the firewall, either a substantial through bolt/ nut/ star locks or maybe bolt to the master cylinder stud.

Also remove and scrape and clean around the VR mounting flange, reinstall make sure the bolts are not stripped and use star locks