The 70 Duster......
I just finished reading the whole thread and it's great to see that good progress is finally happening. I'll bet soon after you're driving that Charger you'll feel it was worth the hassle.
Your body shop being slow and making excuses sounds very familiar, my brother went through the same ordeal and had to pull his car out. In fact, when people show steady progress from a body shop I'm always amazed. We learned to do our own body work and painting on his car and we're glad we did. It ended up being a 4 year project but 20 years later he still has it and it still looks great. The blood, sweat, and tears we put into that car has become a big part of the bond we have with it.
Your Charger is beautiful, I would be very proud if it was mine!