Just note before buying any replacement stock set, your milled receiver most likely has two tangs (top and bottom) that are welded in place in order to mount the stock. These may
differ in length (to the hole on the tang) from that of a stock that was pulled from a stamped receiver parts kit. This won't cause you any problems with the bottom tang as a stamped receiver has no bottom tang, so you will simply have to carefully map out and drill your holes on your new stock. However, if the hole on the top tang is slightly off to the front or the rear you will not get a good fit. This can be remedied by drilling a new hole through the tang and
the stock. In addition, the inside diameter of your milled receiver is most likely smaller than that of a stamped receiver due to the greater thickness, so if the receiver your stock came from was from that of stamped receiver, you will have a bit of sanding to do on the front of the stock. Again this is not a difficult task, just be sure not to remove too much wood from any one side. You will find trying to put back wood is about like trying polish a turd.
But if you're really trying to be a purist then you would research the type/how much lamination, color dye and contour of handguard that mil-spec furniture was given during the time period of issue of your rifle.