Does the Receiver latch look upside down? If you guys see anything strange point it out.
Looks great.
So the receiver cover takedown latch changed in mid 1967 (somewhere around S/N 12,270,000) from the 'standard' lever to the 'inverted' takedown lever.
Nothing unusual about your gun at all. Most matching stocks have a cutout for the inverted lever with the early few having very poorly done cuts which seem to almost be an afterthought. You stock doesn't have the cut because it is an unnumbered beech Albanian replacement stock.