Just some thoughts:
1 the carbine hand guard could be quite valuable especially if it has not been molested
2with a cut down stock, barrel and blued receiver you do not have anything to work with in trying to do a restoration
3 as far as ruining a classic, there are many near originals out there, by continuing the sporterizing of this one you are not diminishing collectables or sporters
4 the gun looks very nice perhaps the hand guard could be sold to finance sights

I think I would keep it for a while, handle it keep it clean and oiled for a while. If it does not grow on you maybe selling it is the best plan. I do not need another sporter but if that one was in my closet in a couple of weeks I would be devising a plan to finish it. Krags are just beautiful in there own way and the smoothness of the action is legendary.