Six pack secondary paper clip test?

Thats great info right there Mattax. Good stuff in those links too. I measured and compared my springs to your pic and I have the black springs. Heaviest.

I was able to do some testing today and the outboards are definitely NOT opening. I tried the paper clip test again and they didnt move. At first I tried just low throttle crusing at 60ish with nothing. Then I did what I tried the other day. Getting up to about 2k RPM in 1st and flooring it. Nothing. Paper clip in same spot.
Then I disconnected the secondary linkage and vacuum and plugged the hoses to just run on the 2bbl. Felt the same as it had. So that cinched it for me that the outboards were definitely not opening. Actually runs really strong on just the center so thats good.

Something I tried just to see what would happen is I took a little off the mechanical linkage rods thereby having the outboards slightly open...just a little. But that was a bad idea cuz they started to bind holding the outboard throttle plates open and it wouldnt return to idle. So I put the rods back to where they were before...just short of binding. Cruze mentioned above that there would be no doubt if they were opening and I believe it, cuz it was very noticeable even when the throttle plates were only partially open due to the mechanical linkage binding.

Also manifold vacuum is at 11-12 at idle. Climbs up to higher teens with lighter throttle RPMs. When I stab it, drops close to 0 (low single digits at least) for a split second, then up to mid 20s. That seems normal to me. When it drops low, I should be getting a rapid increase in venturi vacuum carried to the ouboards correct? But Im not.

Anyways, my thoughts on this are
1) I could try lighter springs. I do have the heaviest springs installed, but even so, shouldnt they open at some point. I mean when I floored it in 1st, I really tore loose.
2) The kill bleeds have been enlarged at some point. I doubt this very much, but it could cause this right? Also, when I removed the diaphragm to check the springs, I checked the bleeds to make sure they werent clogged or something with a very small paper clip. No problem, came right out into the body.
3) Something is blocking the venturi vacuum from the center carb. A gasket shifted or shrunk over time plugging up the port? Either way, Ill get in there and rebuild them, they are due anyways.

Thoughts?