Surprisingly, the only significant wear was in the rear bush of the throttle rod bracket.  The old bush was rebored to a depth of 0.5" and a new insert made up to press-fit.  Close scrutiny of the photograph will show that the right hand wall (lower) of the bush is much thinner than the opposite side.

The new bush inserted and the end filed to give nominal end-play in the shaft.

Having completed this task the remaining rods were also stripped, prepared and then eveything repainted.