I had a thought I was mulling over. I have a bunch of nice leather slings with the "uncle mike" type of hardware. I also have a handful of pre 64 model 70s with the standard 1" sling swivels. So obviously they won't work together.

I wondered if the uncle mike studs would be the same size and thread as the factory swivels? Or are the stud-swivels on the pre 64 super grades the same size as the standard grade swivels?

My thought was that if I could replace the factory swivels without damaging the gun or making the holes larger, I'd switch them out and save them in case i sell the guns.