65 ford doors and ignition were the same. What I am not sure of is if the pick-up was still single sided or if they changed to double sided. As an example Mustangs used single sided kyey until the 67 model year, but the T-Bird switched in 65. Also the Bronco kept the single sided keys untill the early 70's IIRC. Heavy trucks kept the single sided keys even longer.
On these the first thing to check for is an exposed clip on the door, codes were common. If you have to pull the panel, sometimes a trick that works real good is Silly Putty. By squeezing it in to the side of the lock often you can avoid fighting with a nasty rusted clip and also have no worry about disintergrating gaskets.
Impressioning may also be a good chioce, attack the passenger door. If it is a single sided lock be gentle as split plugs were common.