I would, without a doubt go with AMD, I've used Goodmark in the past when nothing else was avaliable, the AMD is far superior in fit/finish, thicker gauge steel, etc,....as for the Chally AMD rears, I don't know if they are out yet,.....The Goodmark Chally panels have issuses with rear valance fit/alignment, gas cap opening is to small, wheel archs can vary skin to skin, panel distotion,.....currently I've only worked with the B Body Plymouth and Dodge AMD full qtrs, and they are as close to original as you can get, I have nothing bad to say about them,....other than I wish they were out a long time ago!....but better late than never
Mike