I currently have a pre-war Model 70 with a G&H sidemount complete with both Lyman and Leupold
Alaskans on separate ring mounts. BM is correct.
A G&H mount with an appropriate scope solves the early M-70 safety issue nicely.
I back the tough scopes up with iron sights and a Lyman 48 WJS receiver aperture sight as well. Nice to have in bear country.

G&H sidemounts are out there-they can be found.

(PS-there are G&H bases out there already cut & drilled. I have owned 3 that lined up with all the holes & worked. But
you can't count on that. Check all the old gunsmiths in your area. The mounts are out there, just not as prevalent as years ago.)