I used the 2 barrel bracket and it works just fine.
What it takes is to bend the bracket into a more upright position and change the angle of the flat where the cable clamp is. (a big Crecent wrench helps to bend it)
But then I had to do what I always do and take it a step farther into "One off" land.:D
I have a cable for trans throttle pressure, so I designed a disc linkage on the carb that is slotted so I can change the throttle pressure cable pull geometry when/if I want.
Moving the bottom stud up or down changes the cable pull geometry.
The top stud is where the throttle cable attaches.