I'm having difficulty closing/latching my doors since I restored my Mustang about 8 years ago. Prior to this time, I don't recall issues with door closure. Closing the doors requires tremendous pressure. I have ripped the door arm rests off several times and friends can't open the door from the outside because the handles require so much effort to open. Recently, I replaced the door seals with no improvement. I noticed the upper door frame was rubbing the roof trim so I adjusted the hinges to eliminate this contact and obtained as even a gap as possible around the door. The door striker bolt is properly adjusted as the door aligns properly with the fender surfaces. I used Playdoh to measure the gap between door and seam weld lip all around the door with seal removed. It ranged from 0.44 to 0.67 inch (see sketch). I used a rubber mallet and piece of 2x4 to increase the minimum gaps to 0.49 inch. I removed the seat belt retractor button since it requires a substantial force to work. Would like some advice on what else to try. I even though about using a heat gun to reduce seal thickness.