Reply to "Wheel Lugnut Torgue Specs"

Get an automatic releasing torque wrench. Set it at the 65-70 and just check them. It clicks when you reach your setting.
Aluminum wheels are the worst for keeping the initial setting. They generally need a click in a couple of days or so and then will keep the setting.
The centers of the custom wheels are cut by CNC out of aluminum plate, sometimes called billit aluminum.
I think that the hardening of the aluminum is done after they are cut and is a surface hardening. It is going to vary from manufacturer to manufacturer on the execution.
The Campis are very high quality wheels by comparison. I believe that they have steel inserts in the wheel at the lug nut.
You should also use anti-seize compound on the threads of the studs. Check them to make sure they are strait. Use a thread chaser to clean and true the threads.
Never use a numatic wrench to torque them up. You can snap the stud, warp the rotor and theretically fracture the wheel itself.
The wider the rubber and wheel, the more stress is going to be on the studs.
I haven't heard a lot of Pantera studs snapping but by comparison, the Mustangs are terrible.