I really don't know how you guys find these fly by night drop ship companies. Specializing in Mustang parts no less. Stick to the vendors we use that specialize in our era trucks.
CJ Pony Parts has been a reputable shop for 30+ years. We used to order parts from them for the shop I worked at in high school.
These days if you actually want parts, you go to who has them.
If you look through the forums for the last couple years, even the specialist shops are selling problematic parts.