The striker has a plastic collar to keep it from rattling. If it is gone (and they often are) the doors will be hard to close. $5 at Autozone help section for a set of collarts that are listed for a ford. You have to tap them on but they will work.
Fair warning...older trucks like my 75 Jimmy the nut was captive and could not fall out. I just replaced one of these on my 88 Burb driver door and the stupid thing is no captive and I had to fish it out of the rocker.
