The firewall under the assembly. The rust was surface and easy to treat.
After. I forgot to take photos before fitting it.
There was no undue wear in the main pivot but it took the better part of 45 minutes to re-assemble it once it was greased and ready to assemble. I had a lot of trouble getting the anti-rattle washers back in. The pedal rubber came back to life with some scrubbing and Glycerin treatment. (Later addition. I also swapped the rubber sleeve on the return limit bar with the one from the other side - for the non-existant clutch pedal. Interesting that it's exactly the same mounting for a manual but the actual pedal must be narrower.)