Several comments:
1. at $375 you stole it, that's less than I paid for mine 15 years ago.
Winchester recognized that they had a problem almost immediately post-64, but it was too late to change back. Somewhere I have an article about the source of the commems, but IIRC it was an employee idea/comments/suggestions drive. The 1867-1967 comm were actually a means of cleaning up the left-over 1866-1966 comm receivers and parts.
The rest as they say "is history"...
On the bright side with mine, I replaced the stamped lifter with the post 1971 cast/machined lifter, and a post 1971 lever with the kidney shaped link slot.
Mine shot like a house on fire, and with a little work cleaned up substantially.
2. In @1970 Winchester changed: cast/machined lifter, lever slot angle and something with the lever link (the part that opens with the lever). This is why some commems are substantially mechanically better than others.
The first guns to demonstrate this are the 1871-1971 NRA commem series.
To tell the "aweful" truth a 1971 to angle eject Win'94 is actually mechanically and materially a BETTER gun than a pre-64 M.94, it just doesn't have the cachet.