Gremlins!!

[furyus 67]

Put a relay from the battery to the alt. regulator.
Use the ign. wire that goes to the regulator to energize the relay. Put an line fuse going to the relay.
This will help reduce the the voltage drop the regulator is now seeing. This helped my pulsating. Also I went from using a dual field regulator to a single field regulator and grounded one field of my dual field alt. Hope this helps.

Done and problem solved!

Then get to rebuilding bro. You really have little choice. Look up a service manual, go to the Electrical section, and see if ANY of the stuff from the fuse box is essential to the car starting and running. I've a '66 Newport, and have a reasonably clean wiring situation for a 50 yr old car. You should be able to bypass the cluster-f@#k attached to your fusebox. This should simplify matters.

Cluster-f&#k bypassed. Now way I'm rebuilding the harness at the beginning of the season. Eventually the dash is coming out for paint, I'll rebuild the harness the correct way then.