It might be a Chevy forum but at least the guy had the good taste to be working on a Ford Fairlane! He probably got more grief from the Chevy guys for that than you would from the Blue Oval folks here.
That looks like a nice solution for the issue of lifting the door away from the car and back again. That is a more refined method of doing what most of us do with a floor jack when it comes to this task. Where I find that setup lacking is that with the jack support on the inner door jamb you cannot fit the door to the opening to hold it there while you are aligning the gaps.