I do agree lokar is the easy way to go. But there is nothing like steel mechanical parts instead of a chinese cable. What I can say is buy 2 because of what I saw they have a endurance problem.
I never installed them so they may have been installed wrong. But I did remove them for manual valve bodies and for factory linkage install. The cables wear and the cable frays at the carb. On the one car the throttle was sticking. It was the Lokar cable frayed and bound up.
I think there was a reason for the factory linkage having that long slotted upper rod. The carb could return even if the linkage stuck. This is just my opinion.
On the cars that came here I did not see a locking pull lever on the carb that would release if the cable stuck? Maybe the installers didn't use it if it was included in the kit.