How did I know which spring goes in which hole, you may be wondering? Am I some Porsche super-jenius who has the measurements in millimeters of every oil pressure-relief spring in every engine they ever made memorized?
No. I would not have a clue which one goes where if not for a couple of indispensable books and some real 356 super-jeniuses that I have on speed-dial. One of the books is this great, seminal text by Henry Elfrink from the late '50s. I have the 3rd edition, printed in 1965 with all pertinent info to this motor.
It's very much like a factory manual but even better in some ways, IMO, because of his wonderful exposition. (He's long-winded...like me on this thread). Here is the specs on the two springs for Paul's motor:
