I have a stock from a Browning 1885 that had a very nicely inlaid tang sight that was epoxied and screwed to the wood. I would not have bought except the price was good and I had a custom stock that would fit it.
I was worried about how it would hold up in the long run and if bumped with the sight extended it might tear it out of the wood. The area where it was is right over the mounting bolt of course so wood is pretty thin there. The Ruger application would be similar if you went that way. I shot the gun quite a bit and it held its accuracy very well but I was too worried about tearing it out of the wood to enjoy it.
I have seen Renner's ad for their Ruger No. 1 tang sight that is attached to the area where the safety is.
Here is a link:
https://www.ammoland.com/2015/11/renner-no-1-tang-sight-for-ruger-single-shot-rifles/ 
