Dart/Scamp

A parts car would be the way to go. You would pay less for the whole car then all touse parts indivdually. You are going to need the whole back end off of a 70-72 Swinger to do it right. The back end of your 75 needs to be cut off and the 70-72 needs to be welded on. Its do able but not easy.

Good luck to you.