Sub frame connectors

Well if I did mistype that I better measure it again and make sure.
I know for fact that they extend a good 6-8 inches over the rear frame rails, so you may very well be right.

Yeah my best guess is it must have been a typo because I think our cars unibody should be identical (2 door coupe Darts). I just would hate for someone to see that diagram and order based off the measurements if they are wrong lol. I almost did but thankfully I thought I better go measure mine just to be safe and that's why I ended up ordering 51 inches instead of 41 :).