The Stovebolt Site Forums The Shop Area Engine Shop Throttle (trim?) Cable to Carb

On a GMC the cable goes through the end of the rod that sticks through the hole you have circled. It was common practice to stick a cotter pin or nail through the hole when the cable broke. There has to be a stop on the end of the cable with a set screw. It was a round brass rod about as big around as a pencil with a hole for the cable and then a set screw to hold it. They usually got lost when the cable broke. I know other machinery uses a similar stop. I just can't think where I saw one last. Chev may have had a seperate stud with a hole in it. GMC Zenith carbs had only one hole. I just went out and looked at a couple of old Chev Rochester carbs. They also have only one hole. The one you picture may have been a replacement that fit cars and trucks and one or the other used a longer stroke; so I feel quite certain that Chev used the same system as GMC The parts book calls the stop a throttle control collar or stop.