Thanks Bob, is it something that would normally need to be done by a gunsmith?
Depends on a couple of factors. Brass frames can be fitted with careful use of file, emery paper and/or Flitz metal polish, if any fitting is in fact needed. Stainless steel easy also. Blued steel needs to be polished and reblued.
Some swaps are simple remove/replace propositions, some require fitting, maybe thinning down to match frame thickness.
Most Ruger take-off frames (from another Ruger) are simple switches. New frames, especially carbon steel, are oversize and in-the-white, need fitting, polishing and blueing.