I have been looking at some z's for purchase. I don't remember on my 78 that the doors where hard to shut like the cars I,m looking at are. These cars have been restored and have new weather stripping on the doors. What company's make seals that are more like the orginals? Can you still buy OEM? Is there anything that can be done to the seals that are already installed, so the doors don't have to be slammed? Or is this a door adjustment problem? Thanks !!!