Mobil 1
ZDDP levels for classic cars | Mobil
From site;
Answer
Mobil 1™ FS 0W-40 oil already contains a higher level of ZDDP (1,000 ppm) that could benefit your flat tappet engine. We also have a Mobil 1™ High Mileage 10W-40 (1,000 ppm); see the Mobil 1™ Product Guide listing the phosphorous...
In this video you can see a little bit of the drive shaft fabrication. I disagree with the above, this thread does talk about an 8 speed which maybe installed some day. OP does talk about it’s advantages.