73 Scamp/Dart Sport interchange

I think you are going to find that not much from the Dart Sport is going to fit the Scamp. You would be better off to find a Dart. The Dart Sport, after the Demon, was the Dodge equivalent of a Duster... both being fastbacks and both having different front ends from a Dart/Scamp. Also the Dart Sport will have quite a bit different sheet metal even from a duster. Fenders may be the only useful part from a Dart Sport to a Duster but I think there is also an issue with the front clip assemblies from one to the other. Only true interchangeables between the two might be drivelines, some interior stuff, and accessories.