Alex, if the geometry on the carb is incorrect, you can not get the TV cable set correctly. I suspect you need a larger radius on your carb linkage to allow the TV plunger to sit higher in the bushing at idle and arrive at the fully depressed position later in the throttle position. There are some good links to this discussion some where in the knowledge base so maybe you can do a search to find it. I have cone some "hunt and peck" work when building the brackets to make a non 700R4 carb work, but have never taken the time to write down the correct radius and bracket lengths. I'll try to take some measurements in the next few days and send them to you.
Crosley, am I not correct in assuming if shifting is good with partial throttle that the gov. weights are about right? Also, would it be safe to disconnect the TV cable for a short, one time WOT acceleration to see if the tranny up-shifts OK ?