Thanks to all who answered my ?
It is not imperative that the conversion be installed, as I am perfectly happy to load only 5. As for the refinishing, it is only cosmetic, as the honest use marks are just showing "Been there - Done that".
The gun still shoots good, and is fairly tight, so I think I will leave well enough alone. Especially if the old parts would not be returned!
I may look for a NM with a 6.5" bbl.
Thanks again,
ArkyJack