Before i get to the doors my father got me a shrinker stretcher for Christmas. i was way too excited for a tool.
Picked up random latch at a junkyard. Pretty sure i took it out of a mazda truck. I welded a small piece onto the latch hammer for the inside door handle so the latch would open the door sooner and i could use the OEM door handles.
Cut a hole in the door to fit the latch and bent up a plate. countersunk the holes so they could clear the inside door jamb. No special tools to countersink, a hammer and a punch.
Mounted the door latch and closed the door so it was flush with the cab, then used a sharpy to make the center of the latch when it was closed like it hit the striker and made a mark on the inside jamb. drilled the hole and made a piece to bring it out to the appropriate spot.
Dont have a picture for the inside door latch but i cut the piece off of the outside door handle and welded an arm to open from the outside. still working on this to make a tighter fit with less play.
BOOM