Will a 1972 Dart rear frame rail fit a 1970 Dart?

Will a 1972 Dart rear frame rail fit a 1970 Dart?

Also, is there a difference between the 4 door rear frame rail and a 2 door rear frame rail?

72 Dart hardtop will work fine on a 70 Dart. I know that the outer wheelhouses are the same for 2 and 4-door, and I am pretty sure the frame rails are the same, but I would have to look in my parts manual to be certain, too bad I am nowhere near them. Where is Rob when you need him...

Same piece, no difference in base rail, 2 or 4 door.

Thanks for the information. Looks like my Dart will finally get some new frame rails.