As far as the tightening of drag with the lugs on I had the same issue with my 68 gmc, took the die grinder with pad to the outer edge of shoes and just smoothed the edge of lining a bit and issue went away seems when they turned the drums a small taper was left near the were the face and shoe run meet( or the azone shoes were a little off) fixed that issue for me previously I had always smoothed the leading and trailing edge on my brake shoes a bit,,, use to come that way but not anymore..
Had the same problem with my 68 Charger, the shop didn't turn the drum all the way to the corner of the drum, causing it to drag when it was tight.
Be sure you didn't swap the self adjuster mechanism and they are tightening while driving forward instead of reverse.
