You have a couple of options....leave it alone and deal with the ol' war horse...
You could also consider getting a non matching but similar stock that doesn't look so splintery for using it and retain the original for display purposes...
You could also go Tapco and retain the bayonet. In any case I would suggest never removing that handguard from its gas tube, and keeping it with the original stock...those two look like peas in a pod.
Your best bet is to leave it alone, you have been bitten by the SKS vampire and there is no turning back....another will be along soon that may have already been messed with that you can either play around with or restore. I do both...full on bubba, yet able to revert back to original in minutes. In many cases you won't be able to do a full restore, but unserialed parts are out there....and you can come close.
If you like to keep your belongings to a minimum...I suggest never going into a pawn shop or gun show again. I am dirt poor and for three days I have been trying to come up with a way to pick up the first paratrooper I have ever seen for sale in Montana. I don't have enough beer cans in the savings account to pony up $495 for a neutered lug 1965 para....I am going to go outside and kick some rocks....
Welcome to the files...and your new addiction.