My passenger door never shut right and it always looked like it was open when shut also had to slam it to get it to shut. When I first got my 50 Plymouth there was no weather stripping on the driver side but there was on the passenger side. No matter how much I adjusted the passenger door it would not shut right. Thanks to this post (got me thinking), I just decided to go to the garage and remove the weather stripping on the passenger door. Now it shuts and lines up perfect . I guess the previous owner had to thick of a seal on for it to close right. Now I have to get the right seals for both doors.