Hi Mike, thanks for the welcome.
Hi Stephen, your analysis of the pic is very good.
The outer sheeth terminates at the rear wall, with as Les described the inner cable continueing on to bolt up to the handbrake. The stepped sleeved on the outer sheeth can act as a locator where it meets the rear wall. In a nutshell it's the exact mirror of what is happening at the caliper end, with the sheeth terminating on the first caliper and cable going through to the second caliper.
The outer sheeth length should be perfect, the inner cable will require shortening from the standard jag length.
THe Mk I and II are near identical for the back half, the differences are in the front half of the tunnel and the engine bay. The Mk II has a space frame around the engine to help it withstand greater torque loading (Not that my tractor donk will ever generate lots
).
I think from memory the Mk I kits use a pressed steel tunnel and has only the main rails sticking beyond the firewall area, please correct me if i'm wrong here.
Cheers
Andrew