Tips on remove/install 71 Duster doors?

I bought a hindge repair kit for my 71 Duster and hope to repair the hindges and replace driver's side door tomorrow. It isn't obvious how to install the new spring (old one broke years ago). I'm assuming I want to install the hindges on the door first and then try to attach to the car. Top hindge first or bottom hindge? I'd sure prefer to read some good tips before I enter the school of hard knocks.
tx,
Ken