Hi jnida,
More close-up picks of your Krag would help us better serve.
Pics of the muzzle, left/right receiver, etc.
Barrel length?... place a dowel/rod down the muzzle to a closed bolt face and mark the dowel at the muzzle opening. Carbine barrels measure 22 inches.
Just posting the serial number would help if time doesn't permit the posting of pictures.
From what I can see... you have what appears to be a very nice sporterized Krag!
Trying to make it original can be a very costly labor of love.
Providing the additional pic/information will help us to provide you the info you might need for further decisions about how to progress.
p.s. I've also been eyeballing that stock on EBay!