Brownells 1" Latigo sling works well with my pre 64 Fwt and the factory swivels. Don't cut very much off the end though. I think I only cut about an 1 1/2" off the end of the strap. If you get one, install it first and see how much excess strap you have. If you blindly follow the instructions, you may end up with it too short.
Last edited by mtech; 11/12/15.