At present lm in the process of changing coolant pipes and heater pipes from engine area to front of vehicle. So while my camper is blocked up, now is the time to fit cruise control wiring and vacuum pipe.
With the the fuel tank dropped by a few inches l fed a mouse line over the top. And today l fed the vacuum pipe from engine bay to front of vehicle area through a large rubber grommet where heater pipes and heater control cable enter's the vehicle. Will use the same place for the three wire cable
for power too.

Im considering leaving a mouse line over top of fuel tank for future use. No harm surely?
The brake vacuum switch is next. Fitted to factory holes in bulkhead by steering column.
More tomorrow...