I see no need for a patch box or grease hole in the stock of a southern po-boy rifle
most of my shooting is target or hunting for which I use a bullet board with pre- greased patches. So why ruin a pretty piece of wood unnecessarily.
On my first build, a Tennessee style, I put in patch box on a beautiful walnut stock.
My wife was trying to tell me not to but I did and instantly hated it. so for the next 30 years I have been occasionally reminded of it.