The Stovebolt Site Forums The Shop Area Interiors Ignition Key and door seals

Evan, from what I've seen of the workings of the Briggs & Stratton locks used on 35-66 GM vehicles, that wouldn't work, because the tumblers (actually just a metal slider - see pic) all come to rest in the same position when the key is removed. You'd wind up with marks on the key that were all in the deepest cut position.

Tim, are you sure that there isn't a lock retainer hiding under the weatherstrip on your rear door like there is on the right side door? It doesn't make sense that the only access would be from a panel that far from the point needing access. Or if your read door lock is the pushbutton type like the 52 and later door handles, the whole pushbutton/lock assembly can be removed after removing the handle. No key needed.

46Sparky's suggestion of looking for older locksmith shops for the try-out keys would be a good idea. My offer of using the keys I have for anyone who would like to send me a lock still stands.