Hard to understand your explanation except to say you are having trouble with the linkage from pedal to butterfly. If you are a machinist. you are smart, handy, a designer, problem solver, innovator. It seems you are talking about rods. Make or modify rods to do what you want. Don't fret over it. Fix it.
Not sure where the o"clock positions are referring to. I know it is hard to explain a issue like this to us who are not there to see it. We want to help but no one will be able to give you a specific set of instructions. As a mechanical design engineer (ret), I recommend mocking up with stiff but bendable wire and possibly string to come across a solution, then use rod stock or the rod material you show. Probably want to leave off any return springs during mockup at first.
There may be someone here who can send a set of pics of what they did with the same motor/carb/TF truck.
The technical term for this is "Fiddle, Diddle and Think, repeat"
