There is a problem with both of those recipes. You are stuffing something that requires a higher internal temperature inside something that requires a lower IT. Example - you want boudin cooked to what, 175-180? And a pork loin you want to cook to 140. So now you have to bring the loin waaaay higher to get that boudin up to a safe temp. By the time it's done, that loin will be shoe leather. If you use raw sausage inside a ribeye, you will have the same issue.
Seems like you're grasping at straws for something different. What about looking for existing recipes that aren't run of the mill? How about porchetta? (Google it) or maybe Babi guling?