Hello, new to the forum. Reviving a thread. Have a new to me 1980 911. It was represented as a Euro car. It has broken head studs and I'm researching what engine and specifically the cam timing adjustment. My Bentley does not seem to cover these engine numbers. Vertically the number is 6300987. The number in the horizontal casting is 930/09. Any information including where to find the actual specs would be appreciated. I hope posting to this thread vs starting a new thread is proper. Thank you in advance. Mark
