Because I'm a genius, unlike those Porsche engineers, I've decided I can do better than them in a couple of areas.
Hence the non-standard cables highlighted below:
The lower one in the pic is for the throttle.
I'm not a massive fan of the standard throttle linkage on a '70 car. It's an awful lot of parts to do a simple job:
Plenty to go wrong, in an area where going wrong can have unhappy consequences.
This thread on Pelican suggested an alternative scheme: http://forums.pelicanparts.com/porsche-911-technical-forum/309504-early-911-replacing-throttle-linkage-morse-cable.html
All the missing bits in this version of the diagram are replaced by a "Morse" cable:
In my case the specific type of cable I have used is called a Teleflex TFXTreme. Most commonly used on powerboats, I believe, and available from your friendly local yacht chandlery. Incidentally in buying these it turns out that, although Yacht Tax seems to exist, it's nowhere near as ridiculous as Porsche Tax.
Anyway.... this sort of thing:
The advantages of this type are high quality materials (corrosion resistant) and, importantly, small bend radius - nominal spec is 100mm minimum, but (in new-out-of-the-box state anyway) they remain smooth well beyond that spec. Point is they are flexible enough to easily make the control run for the throttle.
Final note - obvs my genius statement is slightly tongue in cheek. In fact Porsche changed the design later on, to get rid of all that bell-crank on the side of the gearbox nonsense. So a 964 has a cable run fairly similar to mine (but less flashy cable).