Ok, here's some more detailed pictures. The one is my drawing of barrel symbols, numbers, ect. I know the B means Belgium, the D means it fires 7.62x54r vs 7.62x53r, and the serial numbers match on barrel, receiver and bolt handle.
The receiver has only 3 or so markings. The left top side has the matching serial number to barrel and bolt. The middle front has what appears to be an intentionally removed or very lightly stamped "tree" or leaf symbol? With a "1" or "I" below it. Above the "tree" it looks like there could have been something more, but can't tell. The right top of the receiver has a stylized "YT" or perhaps backward 4T, or likely a Cyrillic letter I don't know and can't make with my phone key pad.
The 3rd picture is what's left of where the rear sight is suppose to be.
Any where else I should look for numbers, symbols, ect?
I've got a friend with a wood M91/30 stock he's willing to give me, and I'm watching a $58 28" 1942 Mosin Barrel (I assume from an M91/30) on ebay. Now, if I can have a shooter for $58 and some hand work I'm all for it; but I'm concerned about getting the old barrel off (watched some YouTube vids) and not sure about head spacing concerns.
By the way, thanks everyone who has commented; this isn't the most important thing in the world, by far; and I appreciate the help.