Interesting post and a very nice KO.
Running changes can drive one up the wall during an attempt at an authentic restoration. It appears Honda created many such problems/puzzles. Also, especially in early years, perhaps there are some items that are just not absolute. But, take heart. It isn't unique.
As unrelated (worthless) examples:
A '48 Ford had over 40 running changes - this drives the owners and judges crazy at car shows. Many a trophy has gone to the wrong car/owner simply because the judges just can't possibly know everything.
As another example, the Model A Ford guys have been arguing for 50 years over whether the fenders (all black) were enamel or lacquer. Some orig A's were found to have one or the other). Obviously, Ford used both as was convenient. However, neither faction of model A collectors are willing to conceed to "both" and continue to fight over "which"!
I once got a 1st place trophy on a '48 Ford convertible that obviously had an easily recognizable '49 engine. (This, with a "Do Not Judge" sign on the windshield - which I put on all my cars).
This stuff can really puzzle a perfectionist. But, ain't it fun!
Lecram, you surely made a very lucky "find"!