Possible kick down solution!

You still messing with that? Like said before, the back of the slot should be touching the carb linkage pin. If the rest of the linkage isn't correct for the combination I would get a aftermarket cable like Locar or the like and get rid of all the BS you have going on there. Ne reason to reinvent the wheel.
I am still working on it. More of just something to do. A challenge. I appreciate everyone’s responses and I know the best thing to do would be buy something else.