The clown's name is spelled "Clarabelle" in the credits, but, on the box he carries in front of him, it is spelled "Clarabell."
Richie: I'm gonna interview Howdy Doody.
Potsie: How are you gonna do that?
Richie: I'm gonna pull a few strings.
Bob Brunner (for his acting credit) is credited as "Robert Brunner."
Bob Smith is credited as "Robert E. Smith."