Info from GMPartsWiki
The GM Parts History says 3684167 (Driver's) was discontinued in 9/74 and 3684168 (Passenger's) in 11/73.
Looking at the GM MPLs, there were no part number supersedes between 1947 and 1971.
Comparing the left (old) and right (new) images, the old latch does not look like any of the NOS latch pictures that I have saved.
I also think the new purchase is a NOS latch.
But what about the old latch. Scratch head. A used clone?
