Jaguar Repair: S3 Fuel pressure, manifold vacuum, vacuum diagram

Question
I have checked the fuel pressure from the fuel pump on my 1974 S3.  I shows 1.5 to 2.5 psi.  Is that the norm?  
  The car has a phenomenal number of vacuum hoses.  The only vacuum hose diagram I have is one made up by a mechanic that unfortunately does not match the hose connections on the engine.  Do you have a clue as to where I might find a diagram?

Answer
Hi Geoff,
Your car if it is a 1974 is not a series III but a series II (Carburetors) and it can use 1.5 to 2.5 PSI fuel pressure if it can maintain that while running under load.

Sorry, I don't have a vacuum diagram of that car. There was one glued under the hood of the car but most are long gone by the time the car gets a little age on it.

In 74 Jaguar was still struggling with emission control so I am sure most of the vacuum hoses were for that purpose. If your Jaguar dealer can't come up with one you may just operate most by what works.
Ported vacuum to the distributor, straight manifold vacuum to the firewall port for the AC/Heat system and straight manifold vacuum to the cruise control and the vacuum reservoir tank.

Howard