I've got a standard pre-64 with a lyman peep as well. I carry it as my bear spray while guiding. I've thought about the same question for my rifle. I have a leupold 3x I'd like to put on sometime. I'll probably go with Leupold's dual dove tail rings and mounts in low. It isn't something you can easily change while hunting. But also wouldn't be too hard with a screwdriver and torx-driver. You would have to take the scope out of the rings but you could leave the bottom of the rings still in the mounts. I've also consider talley's mount/rings system. I believe it lets you remove the scope and rings and then mount a peep sight to the rear mount. Would work well for in field.
