In addition to facts, some mechanics also need glasses, to read the facts presented in front of them.
Carburetors should be tuned for what the engine wants, not by a manual or by what a forum says "should" be in it. This will require running it and seeing how it performs. Pain in the ass, especially if you have to take the carbs back off to change jets, but consider that you have no idea where this thing has really been- 40 years is a lot of time. The engine could have a cam in it, the ED carbs might have been found and tuned to the engine, etc.
In a general sense though, we can say with confidence that if you don't have the restricted air intake like the ED/G bikes did (so the listed 78 mainjet for those carbs is irrelevant to you now), and if you're running aftermarket 4-1, then you will need to up the jet beyond stock, which we could consider to be ~100. Combine this rule of thumb with some oddball carbs like you have (there may be other differences in these carbs, like emulsion tubes and needle profile), and I can see you running a 125 mainjet, even though that seems "big." I would clean the carbs, reassemble with fresh gaskets, and see how it runs. You might be pleasantly surprised.
I'd leave the needle alone too. 3rd position is stock IIRC, one notch higher to compensate for the air filter and pipe sounds reasonable to me.
