The thing about late 40's and 50's cars is that nobody is building them anymore, not in glass nor in metal. So the fact that they are 4 doors versus 2 doors may be a bit inconsequential over time. I have seen a number of 4 doors customized to the point that they are every bit as nice, or nicer than many two doors. As a matter of fact my 57 Olds is a four door car. Can't beat a four door for comfortable cruising with 3 or 4 of your best buds or chicks as the case may be.