1965 Dodge Dart Door Locks...

Couldn't a locksmith remove the retaining thingy and turn the arm around?
He suggested the swap, so I assumed it can be done.

I am pretty sure the door locks are not interchangeable. Only way to remove the lock paul would be to remove the factory staking,the stops on the back are not centered so changing the paul would not work.The cylinder plug only comes out the front face which requires removing the face cap and replacing it with an after market one. Sorry ,the "paul" is the arm on the back.I'm using locksmith terminology.Best thing would be to take it into a locksmith,of course I would say that because I am one.:-D I will try to find out for sure in case you don't get an answer.8)