How to determine what emergency brake setup my 73 challenger had

[Grec]

The car has zero hardware from the original ebrake setup on it. From what I can tell, there's two possible types that could be found in a 73: one version with the intermediate cable, and one without.

Is there a bracket or some other clue under the car that I need to look for to determine which set I need? Or since I'm starting from scratch, does it matter?

Thanks.

[Bullitt-]

I think by '73 only one setup was used with intermediate cable
Kits avail. http://www.inlinetube.com/

Hope this helps
http://www.inlinetube.com/Brake%20Cables/Brake%20cable%20instruction%20sheets/70-74%20Mopar%20No%20Inter.pdf