So to recap.... Drivers door will not close and passenger will not open.
I knew I needed to get to the door latch and manipulate it but since the door is closed, getting the door panel off is not possible without mutilating it and I'm not willing do do that just yet as I may need it.
Doing a little research and I found a post here that indicated there was a flaw with the '67 latches and the unlock procedure was to basically "Slim Jim" the door.
Not having a proper Slim Jim anymore (In my past life I did have one...) and since in this case you only need to push down on the relevant part (Door Latch Pawl), I used a large flat blade screwdriver to wedge open a slot at the window and inserted a piece of aluminum I have that's about 1.5x.25"ish and attempted to find the pawl.
I couldn't find it by feel. An actual Slim Jim is easier to manipulate as it's much lighter spring steel so the, "Feel" is better.
Modern technology to the rescue:
USB Borescope camera. These can be had for less than 20 bucks (!!!) all day long on ebay. I've got it strapped to the bar stock back far enough that the plan was to get the corner just forward of the camera on the edge of the pawl and give it a push.
Here's the manipulation setup just after the door popped open. I was working the camera and looking over the latch and decided I needed a little bend in it to get to the pawl better as I was aimed right at the pivot point. I had already given it a little push and it didn't feel like it moved. I pulled the bar out partially and as I started to give it a little bend, the door popped open.
It appears after looking at the latch that I may have broken the latch spring or possibly gave the pawl just enough push to loosen it up.
I found the remainder of the pawl spring on the latch and noticed that the torsion spring was missing. Thinking that it could not have gone too far, I dug around in the mulch at the bottom of the door and found these.
Our Favorite Cougar Parts Place has the door latch (pawl) spring but a little searching so far shows the torsion spring to be unubtainium. Anybody have a source for these things or am I going to have to wind my own?