Here's a suggestion. Take the one with the worst door problem apart. Remove the interior. And see if the door closes all the way. If it does then I'd say you need to trim the width of the floor of the interior. I discovered that problem on one of my M2 castings one time and I shaved off a small amount from both sides of the floor and it took care of the problem. Also another thing. The henges are held on the body with screws. And when the driver door is being closed it would be in the direction of the screw threading tight and it's possible that may have happened. And the screw is too tight to allow the door to close up properly. You know how it is with parts and pieces. Sometimes they don't mesh together right. I broke the door off of one of my Camaro castings from M2. I fixed it tho. I just put the door in the correct position on the car and J. B. Welded the henge back on the door. After 24 hours I opened it and painted the J. B. Weld to match the color of the door and henge. I can't remember which casting I had to trim the floor on. With over 200 M2s. in the collection Lol. Anywho. Nice new addition to the 68 Plymouth Barracuda's collection thanks for sharing. 👍🏾😎