OK, so the FE, FC and FB washer pivot arm spacers should all be drilled and tapped, with grub screws in place ready for the owner to go to the NASCO shop and buy windshield washers.
Silly me went to the NASCO shop (or at least it's 2010, expensive equivalent... EvilBay ) and bought some pivot arm spacers. When I compare them to the ones I already had, there is a subtle difference (see photos below).
The ones on the left of the photos (with traces of green paint) are thicker, and are drilled/tapped on both inboard and outboard sides (two grub screws for each spacer). The ones on the right of the photos (woth the nozzle installed) are wedge shaped and are only tapped on one side.
Can anyone explain to me the difference between FE, FC and FB windscreen wiper pivot arm spacers, and which ones the below are? Any idea what the nozzle was originally off (I understand from one of RET's old posts that the FE and FC Holdens nozzles (part number 7406027) are sort of a cone-shaped affair, maybe 5/16" across, with a threaded section at one end and a pin-hole in the side of the top. The top of the 'cone' has a hexagonal head, reminiscient of the screw-on fitting at the end of a capuccino frother on an espresso machine).