I wish that I had better pictures left from my FE cobra, but I had to delete them to make room on the computer. I am including two photos, you can see the linkage to the carb somewhat in both photos. I do not like the idea of looping the throttle cable around like was done, or you are proposing. in the photos that I have you can see a bar going across in front of the firewall that is hooked to the throttle cable on one side and the throttle linkage to the carb on the other. I think that you want to try to have some form of solid linkage, or if not possible at least a much shorter cable.
Another thing that I noticed was the lack of a second throttle return spring. You always want two springs trying to move the throttle linkage back to idle.
there are much more experienced engine builders on the forum who will certainly have better pictures and advice.
Good luck.
