Never use a Z bend on metal carburator throttle arm and never use a metal clevis or metal pinned clevis on a Metal carburator throttle arm. This is an accident just waiting to happen. Even if it works ok at first The hole 'will' get bigger with vibration and will reach a resonence at some point and will emit stray RF noise at some point.

In the days when most systems were AM which did seem to be slightly more vulnerble to this it was SOP to never to allow metal to metal at the carb but we seem to have forgotten this and its distressing seeing many arfs coming these days with hardware for S bends at the thorttle. If you have metal to metal at the carburator arm then fix it or you will have a problem sooner or later in the life of the installation.

This is also and excellent demonstration of the fact that a range check without the engine running at is like no range check at all.

John