hi
not true , i for one have built many manual vb and left the original kick down / throttle psi lever at full leingth !
make sure the gov has been removed .
may be someones vb kit screw up ???
also i have 2 vb turbo action , 1 i bought new at a dodge dealer in the eaarly eightys and one that came in a trade in trany and they both have a rod that will accept a kickdown linkage .
i installed one in my car for a while with a kd linkage just to fool some of my buddies about what i had , but even though the carb linkage worked it it did nothing!!
i have also built full manuels for the street that did use k d linkage to soften the shifts at low speeds !!!