Cal, If you've been running a 3/4 lug nut, chances are that your ARP studs are still only 7/16 or 12 mm. I'd still up grade to 1/2, [bigger IS better]
My choice in tube would HAVE to be DOM. It cost a little more per foot, ,,, but don't you think you're worth it.
Or, with a F-body car, you might be better off buying a pre-bent kit, that is most likely DOM to start with.
Either way, if you are installing your self, you might want to look at Harbor Freight for thier 'hole saw'- 'Old Joint Jigger' type tubing knotcher.It sure beats the die grinder and cutoff wheel program, and a bit cheaper than the Mittler Bros. end mill type.
Nobody ever PLANS to crash,,,,,,,but the difference in the little things can mean the difference between a wild ride with some twisted photos to show your grand kids and a closed casket with your buddys mumbling "what was he thinking."
Any how---- A MERRY CHRISTMAS TO ALL
Rick