Definitely get the front of that bracket well secured so it doesn't twist around and get hung up in your throttle linkage. A little bend on the end and some radio mounting strap with a carriage bolt should get it to reach the front carburetor stud. A throttle stop is s lot less enjoyable when it becomes a throttle hanger, lol!
I agree ! find another place to secure it in the front as it will pivot with pressure on it .. also you might need a longer bolt on the stop the one you have might not be long enough to slow you down as much as you want