Need help with ID of 915 Transaxle

[jess p]

I have a later 915 Trans, Aluminum case, electric speedo. 8:31
r & p. Case #'s are 915/6? 74D3647 The number after the
6 was ground away. I suspect it is a 78 or later.

Sceond question, please. The trans is missing the differential
and axle flanges. I happen to have two differentials sitting
around. The numbers are 911 332 212 0p On the second
differential, the numbers are 930 ??? ??? ?? Did Porsche use
930 differentials on their later SC cases? Am I able to use
either one of these differentials in the above case?



Final question. What years 915 cases can I use for the axle
flanges for the above case.
Much appreciated!