I'm missing the logic on a full military K98K to be drilled and tapped and turned into a demilitarized sporting rifle in 2015. If you want a K98K to start or add to a milsurp collection that's great, but to turn an original mauser K98K into a half ass sporting rifle today is out of the question. First you'll pay anywhere from 496 to 700 for a Russian capture even, then you'll have to get it set up for a scope at around 200, and you are left with a heavy, rifle that was never meant to take a scope in the modern sense of the word with a low profile and nice tight cheek weld without s riser added to the stock, another additional cost.
If someone is giving you the rifle, and someone is going to set it up for a scope for nothing, and you don't mind ruining a military collectible rifle, then have at her. Otherwise,..spend 350 on a Savage axis to hunt with in economical .308Win with the money you'll spend to set up the K98K after the it is bought, and then just buy a K98K and leave it original to caress.