318 2bbl won't idle without choke

That looks good and well documented! Will take more time later, but what I can see now, the rod on the plunger arm should be in the inner hole and in the middle hole at the throttle lever. Had it first like you but changed the position after reading the BBD manual below. Can’t see it on the pictures, but is there a check ball (larger one) under the plunger? Are all the needles and passages on the Venturi lid and cluster free? Did you blow air through all passages of the carb, carb lid and made sure those passages are free?
Here is a good manual covering several BBD models:
http://u225.torque.net/cars/SL6/docs/BBD_Manuals.pdf

Wolfgang