Curl,

Before glass bedding was discovered/invented, the standard accuracy treatment consisted of shimming. A shim or shims was/were installed in the recoil lug recess in the stock until total contact between lug and stock was achieved.

Depending on the thickness required to get the recoil lug to contact, shims cut from such sources as aluminum soft drink/beer cans and from the aluminum tops of sardine cans can proove useful.

Brass shim stock is available in assorted thicknesses, but does not do as well as aluminum when used in contact with wood, since it tends to corrode.

Shimming should not alter the pristine nature of your acquisition at all.

Bill