Just to embellish on what Bill said (and because pictures always help me)....
3-window coupe (back window and 2 door windows):
5-window coupe (back window, 2 quarter windows and 2 door windows):
And then the roadster: (I didn't really need a picture of a roadster because that's what you built so you already knew what they look like but I found one with a pretty girl. JUST COULDN'T RESIST!!) :lol: