Door Alignment Problem - 65 Dart Convertible

I dont know how much radius your vertical lines have. Consider this for example..
(( Imagine one radius higher/lower than the other then bring them together.
Just a little difference in heigth throws the corners in/out a lot.
Repeating what other have stated "Not on a rotis.
If the A-pillar is leaned in toward the rocker this L shape isn't right now and wont be the same later.
Having said all of that... You actually have fudge lines to work with. Where the hood fender door all meet the cowl is always a far cry from pretty or the same from one side to the other. Then there's the lower door to rocker line. You may be getting a good view of that line while on a rotis and focusing on a gap that isn't so critical when the car is on its wheels.