Here is part of the diagram for ’77 front mounted pump.
I think this will back date all the way to ’73.5 CIS if the
alu crosmenber is used.
"
"
(C) Dr. Ing. h.c. F. Porsche A.G.
There are some later SC updates that are helpful.
Who can help apply that to an earlier CIS?
Best,
Grady