Hello,
I'm in the process of installing a reproduction door on my 59' Apache (passenger side). I'll tell you my experience thus far. The reproduction door is almost dimensionally correct compared to the original door. With the door on the hinges and no hardware attached (the latch, striker, access cover) the door fits will inside the door frame. When I added all the hardware to the door, I could no longer close the door. The door latch hits the pillar as well as the door his the pillar. I cant move the door toward the fender because then the door fouls with the fender.

Here's the issue I found:
The outer skin of the door is 3/16"-1/4" wider from the part of the door that fits inside the door frame to the edge of the door that follows the fender line. Because of this, I'm not able to move the door forward towards the fender.
I can take photos of this is you would like or if it would help explain the situation I currently have.

links to photos of my repro door installed:
Outside view: https://swenracer.smugmug.com/Trucks/59-Apache/i-XHfcPtr/A

Inside view: https://swenracer.smugmug.com/Trucks/59-Apache/i-N4nqm2M/A

The door I purchased is from Classic Parts: http://www.classicparts.com/1955-59-Door-Reproduction-Right/productinfo/20-392/#.Vmj9ObgrJhE