Crack surrounding door striker
Make sure hinges are good and if they have been removed for body and paint adjusted properly...you'll know because the door should shut nice like any other car, don't accept "its a Mopar they weren't perfect" the door should close properly . With the hinges properly installed and the striker properly installed and adjusted all the body lines should line up nice. and the door should close with a one or two finger push. If for example the door is a bit low at the fender the door wont shut properly it tends to hammer the striker, also the striker would have to be adjusted all the way up for the door top to align with the quarter etc.