tube80z, Great information. Are the rear control arms pictured a "toe-link" style? Looks like it but I wanna be clear. Does it help with side loads because it stays still more than the bushings?
the brake upgrade looks GREAT! would love a set of those hats or the cad file. How do you like the aluminum hubs? I have a set in a box. I even bought the bearing spacers (DPR). But I have some kinda mental hang-up about the use of aluminum there. I know It's not rational.
Once you get the paint and sealant off that area You might decide to leave it and plate over for main hoop. I think it's doubled there.
I thought about putting a hole there and extending the hoop out the floor. Then cap it. Good jack/ jackstand point. I dreamed of air jacks somewhere near there.
I hope this link works. I needed something like this 20+ years ago.
Of course, I also needed the internet!
www.woodworkerb.com/home/datsun-240z-rebuild/half-shaft-rebuild