I also ran into problems on my 74 dart. I bought a replacement quarter panel from AMD clearly marked and sold as fitting a 73-76 dart 2 dr. It was over 1 inch too short length wise and the marker lights were WAY off. The rear angle where the tail panel meets is also off about 10 degrees. I did report it to them, guy said he'd get back to me, I followed up and was told the quarters were now on back order, this was over 2 years ago, still on back order. I expected some fitment issues but being off that much, yeah that's a problem. Pics in my build thread linked below.
