How to install Speedcable in VK Commodore?

[dvstudio3]

Just wondering if anyone can tell me how i can install a new speedometer cable in a VK 1985 commodore. (diagrams will be handy if possible).

Thankyou

[VK SL 3800]

Most major problem you will have is fitting the grommet into the firewall as you cant get it off the cable it self so and wires or pipes running through the same grommet need to be removed and thread through it again.
To Get the cable off the speedo you can try and reach under the dash but that can be hard, you can do the dodgy way and remove the center speaker on top of the dash and from that hole you can reach in a undo the clips or i recommend you pull out the dash ( very easy) as you can see the grommet in the firewall and see what your doing, and also fix any rattles or problems while your at it.