[VintageMusclecar]

Verne;

That's actually the correct combination. There will either be a slot on the air door shaft or the vacuum break, but not both. Since you said the carb was/is missing the vacuum break rod all together, I'm led to 1 possible conclusion;

The secondary air doors are opening, but MUCH too quickly since the vacuum break isn't connected (the vac. break controls how quickly the air doors open along with the air door spring adjustment).

Hence, bog city.

If you'll notice, the carb is missing the secondary lock-out lever as well, so we know the secondaries aren't being held closed by that.

Get me the #'s from the carb and I'll see if I can't scare up an air door rod and a secondary lock-out lever for you. Check the vacuum break to make sure it still holds too.

How quickly do you need to have the carb wrapped up?

Eric