Thank you. That’s what I thought as well but wasn’t sure the Timney would work as it’s hard to find examples on the web of people putting it on a commercial sporter made pre-war, most examples are with FN Mausers or sporterized Military K98s.

If it requires minimal gunsmithing and I can still keep the original bolt shroud unaltered for retaining collector value then that may be the best way to go.