As for tightening and torque references it is 55ft lbs by the manual for 7/16 inch studs and to 65 ft lbs for 1/2 inch studs. HOWEVER:
-Your wheels will likely all come loose if you torque them to 55 ft pounds. One has to keep in mind that the torque spec was for and acorn style lug nuts on a stamped steel wheel with a raised seating area where the lug nut goes. There is spring tension on them when torqued which is likely factored in.
You are torquing a flat on flat on flat. Ie: the wheel is flat on the hub, the washer is flat on the wheel, and the stud rests flat on the washer. It’s like a stack of pancakes and if you torque the to 55 I could pretty much guarantee they will come loose. Your 7/16 stud can handle 70-80 foot pounds (spec taken from many legitimate sources) with NO issue. Use 75 if you like. When installing custom wheels (especially non acorn style, most commonly referred to as Mag style nut) it is a good idea to check and recheck the torque on them often especially for the first 1000 miles at 50-100 mile intervals. They will loosen and settle until you find they will finally hold the torque value that you intended.
Another word of warning is to definitely not over torque these Cragar lug nuts (the 09004 and 09005, which as discussed are the correct ones for your application…) because the washers are thin and soft like Swiss cheese these days and they WILL bend and get sucked into the hole and wedged onto the nut. The older Cragar washers were much thicker and did not do this. I’m lucky as I have circa 1997 washers and use them instead of the newer ones. New ones are thin!. Something was lost in translation over time with new runs of manufacturing over the years. Plus they try to make everything cheaper these days.
Good luck.
PS. People will get one here and tell you both I’m nuts and you’d be nuts to listen to me if you torque to 75 ft for this application. Don’t listen to them. I know what I’m doing, have worked in the industry for 40 years and have yet to have a customer come back with broken studs or loose wheels….
