How To Simplify Parking Brake Cable Routing?

I would like to convert the '65 Formula S parking brake factory cable setup to something similar to later ABodies that use a single cable under-chassis setup. I read somewhere on FABO where a couple of forum members had the know-how or saw this on their own vehicles, maybe Dusters (but I don't remember who it was or what thread(s) made mention of it). Evidently, the factory used this system in later models.

Anyone have a lead on what I am referring to? Thank you.