318 Main bearing part numbers versus year application

Ive bought lots n lots of new but ancient parts and for the most part I have had less trouble than i have had buying new, recent stock parts. Especially electrical ones.

On something like a set of engine bearings (I did get a defective set of them one time, price was low enough I wasn't worried about it) but I saw the issue as soon as I unboxed them. I went back to ebay and ordered another set, had em in a few days and even having had to buy a 2nd set of (I forget whether they were rods or mains) I was into both sets for less than 1/2 of what napa wanted for 1 set. These were for a /6 I put together last year
They had a coating that was peeling/ flaking off. They may have been just fine but in the overall cost of a complete overhaul these days the cost was minor.... especially for the piece of mind factor....
I try all I can to avoid chinesium, there are many parts I even go get at a boneyard, that 10 years ago I wouldn't think of replacing with used/ but good used original , or have been replaced but some years ago, seem to last as long as some new parts currently available.
Now on something like internal engine parts there's no way I'd put used parts back in on parts typically replaced on a rebuild.