I've owned a 1955 Chevrolet Bel Air 4-door (my avatar picture) since 1978. I now have two and am starting to restore one. I'm confused by the choice of hardtop or sedan. Which do I have? They both have the post between the front and rear doors and another post behind the rear door. Are they hardtops or sedans? I fell like such a dork having to ask such a question. Thank you for clearing this up for me. Ken Campbell