I wouldn't think glass plates would be any different than film re expiration. Maybe even easier to deal with because no issue of film curling. I recently shot a roll of film from 1944. Developed in D76, used a bit more agitation. Over-exposed by a stop or two. Came out pretty nice actually, I was surprised. The annoyance was loading it onto the reel with all that curl. How are they re packaging? is the material separating the plates ok? has it adhered to the emulsion or anything bad like that? Give it a shot and let us know how it went.