If the stock is off, I would put some penetrating oil like Kroil from behind where the back of the firing pin sticks out. I would have the receiver facing down and a way to keep the Kroil from running out.
If the stock is not off, try putting some Kroil using a flux brush or some small brush around the set screws and bushings and let it sit over night.
There is most likely crud in the threads stopping both from coming out.
Thank you. Will give that all a try shortly.
Are there folks who make new pins for pre-1913 guns, or are NOS and used typically what people find for replacements?