Joel, try your Google link again!
This is what it shows me:

Argentino M1879 Rolling Block. Is it worth restoring?7 posts - 3 authors
Rolling Block in .43 Spanish (go to keep the Google hit rate up!) Sorry! Forgot to write Jamison .43 Spanish for Google's benefit ...

Up to No. 4 now!

If you would like some advice on how to fix the hinge on your "hair-loom" shotgun, please post a couple of pictures showing details of the hinge components. Above all, a close up of the existing pin. Then I can give you some "spoon-feeding" about adjusting (more likely: replacing) it.

Patrick