What a SPECTACULAR job you've done with it! They never looked that good when new!
I often think one of those is in my own future if I lose my coordination abilities (for shifting-clutching) when I get near 100(?). That won't stop me from riding, but might make shifting tougher, and the "A" is also lower in the saddle because of the wet sump design.
What headers and pipes are those? They look SO fine!
You are correct about those parts: Honda was quite unsure when the "A was introduced about whether it would fly, as it had to be seriously detuned to cope with the in-gear stopping ability in city traffic, so they didn't design everything at the beginning. It was far better received than they thought, so they kept on afterward with their usual minor primping, just enough that the later parts have now become more common to locate.
600 original miles! Where DO you guys find these bikes?!