Well Geez,
Why waste your time and money getting that mauser drilled and tapped, and turning down the bolt handle, and installing a new low profile safety, and looking for scope mounts, when there are already tens of thousands of them out there in this condition that are readily available at cheap prices?
My advice: Go to a large gun show, in a large city, and take your pick! These rifles are definitely Old School these days, and the two generations of folks that really liked them (WWII and Korean War) are retiring their collections every day.
You are re-inventing the wheel!
Best, Mannyrock