Matt,
Great job and excellent photos.
You did this in the nick of time. I have seen the tits broken off with just this degree of wear.
Yes, the originals were cad plated as you see.
Good researching! Can you post links for the on-line sources you found?
I had forgotten about the Pano piece. For reference it is
Up-Fixin der Porsche, Volume IV, page 47. Frank Barrett was RMR-PCA Newsletter Editor at the time (’74) and co-authored much due to my lame writing, pre-word processor. We still see each other regularly. He is now on this Forum.
I encourage everyone with these years (late ’67 to early ’71) 911 and 912 with the simplified differential to do this update. The carnage that happens when these tits wear and break off is unbelievable. The big differential pin slides out; the inertia of the car breaks the pinion, input shaft and case. The transmission is not repairable. Very little is salvageable.
Best,
Grady