If it runs what even a woman conciders good,
...maybe even near perfect, I wouldn't care. And except for the muffler and the cap over the air screw, I don't know how you could tell what carb mods were done,......unless the screws on the carb bowl are all buchered.
I believe mine was stock at 3800 miles, muffler, and the plug still over the screw etc. Mine run good except surging badly at light load 1/4 throttle, so I did the 1/2 spacer, and now I call it perfect. I see no need to ever remove that brass plug,...low speed and idle is perfect. And I don't detect any hi speed leaness either, even w/ the drilled exhaust.