Preferred linkage for thottle?
It's bad to have metal that can rattle against metal. The throttle linkage is particularly bad about this because of the vibration. I have had radio jitters just from touching a screwdriver to the carburetor.
When I suggested metal clevises, I should have said "SOLDERED" to a metal pushrod. The other end of the metal clevises I mentioned were in plastic. And the throttle arm should have a metal ball link which has a plastic socket that threads on to the pushrod. No metal-to-metal rattles in my linkage. That's why not to use an EZ connector on the throttle arm, and REALLY why not to use a z-bend on a metal throttle arm!