The 4 door cars have smaller doors. I'm only 5'6", and I HATE them. I can't even imagine how bad the 4 door cars are for 6' guys. I prefer the larger doors on the 2 door cars.
That's an interesting point, the only 4-door classic Mopars I've driven have been C-bodies which obviously have longer doors. I'm 6'1" and didn't have issues with those but I could see A-bodies being kinda tight.