Oh, quick tips with gaps...
Be sure to install the door latches at the rear of the door while you are setting gaps. It is possible to set the gap at the rear, and then find that the latch assembly will not fit. Always a bummer!
The frame and body will sag very slightly once everything is installed, so the gap at the upper rear will close just slightly after the restoration. We are talking 1/32" or so.
Test your lower door seal before painting. The new seals are thicker than the originals and are a problem. If your lower edge gap is decent, the seal will not fit. I left mine off. Others trimmed their seals to fit the gap. In any event, best to know how you will deal with it before the paint goes on!
I would think 1/16" is the absolute minimum. More than 3/16" starts to look excessive. But the main thing is that the gap is the same along the length of the gap. In otherwords, 1/16" at the top and 1/8" at the bottom will look like the door is sprung.
Good luck...don't feel bad when you get frustrated with gaps...they are a bear, but well worth it for the life of the car after the resto!
John