Welcome to KCA. You have an interesting looking Krag carbine there. It sure has seen better days but it is still a Krag!

Your stock sure could use a good safe cleaning with mineral spirits to get some of that crud off. It shouldn't hurt to get a few layers of that black crap off and then a few good rub downs with boiled linseed oil would help tons.

I can't see- do you have a front sight blade in that base? Hard to tell from your pictures.

That's a pretty neat leather butt pad. Might be nice just to keep it. The butt plate could be bought for a replacement off ebay as well as another side plate if you want to get a better condition one (not scratched.) . Nice to still have that carbine rear sight.

How's the bore? I love good bores and since yours is a later date Krag, it may have bypassed years of abuse and poor cleaning from corrosive primers.

The serial number's first digit sure looks like an "8" doesn't it? Many people mistake deeply struck "3"s for an "8".

Thanks for sharing and keep us informed as you fix her up!