Factory reference points missing?

[tperazzo]

I found this diagram here on Pelican that was scanned from a factory manual.





I want to use a tram guage to check and compare the G dimension, but i can't find the rear holes.



This is a picture of the left rear where the hole should be.

The chassis is a 1974 911S. What am I missing? There are a few smaller 1/4" drain holes in the vicinity.

Thanks,
Tom

[Ferrino]

I'm doing this exact same job and was looking for my, erm, "G-spot" the other day. This is a 1976 911S and I found plastic bungs in those corner positions of the floor pan. When I pulled the plug, the holes were threaded, as below.

Looking at the workshop manual, it looks like these points were only introduced in 1975.

[tperazzo]

Thank you Ferrino, that explains why they aren't there. I will use the trans mount holes instead.
Thanks,
Tom