Advance and throttle notches

I'd lay a piece of sheet metal on a heavy, flat wood & make indents with a BLUNT chisel & a HEAVY Hammer. THEN, cut a curved piece from it & "GLUE" it on top of the original slider.
Bill Banging
 
The wear is almost 1/8 inch. The levers don't move up and down and I can't push them into contact. I've thought I will have to disassemble the wheel and steering tube to find the problem. Maybe not assembled properly. I've been putting the job off since I don't know what is involved or rather what is inside the tube. Those rods might be each in two parts with a slip joint but I don't really know if that is true.
 
I seem to be missing the notches or detents on the throttle lever and timing advance lever? Where are they located? 1930 Model A Briggs Fordor
Thanks

Yup! Mine are gone too! Henry Ford put them on the flat slide plate that the lever rides on! If ridges are gone, they are just worn off! What I did since the gas arm seemed to be the one I was concerned about, I got a little block of wood and my rubber mallet and did a hit to move that flat plate to be tighter on the lever. I think there is a suggestion to file them back in also. If You are not having any problems, then it gets down to being just a cosmetic thing.
 
If the rods have just been plated, I have seen the plating go around the corner and cause the upper bushing to bind on the long reach of the rod, must be removed. Repairing the groves on the notched plate usually bends it down and away from the lever part of the rod - bend it back to contact. The underside if the lever that wears flat is the problem more than the notches because, when worn flat and wide, it bridges the notched groves and slides right over them with no detent.
 
Another thing to do is to just slip a rubber tube over the levers. The friction will keep the levers in place and the wear will stop. Experiment with different tubes until you are happy with the results.
 
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