Duster/Demon

I believe that the front ends are different, tailights, the duster has a shorter driveshaft and wheelbase by 3", fenders and interior, um these are just a few I know off the top... other than that im not sure.

You are correct Mopar_Chick. I have also installed a 70-71 Dart/Demon front clip on my 73 Dart. Bolts right up.