I have never ran 24s, only 22s.
I was running a 4/6 drop on 285/40/22 tires with zero rubbing. I did do the "Norcal" mod to the front.
After swapping tires out to a 305/40/22 it rubbed horribly so I lifted the truck up 2" all the way around and am now at 2/4 with no rubbing.
I am not certain how all of this may relate to your wheels and drop BUT I was tagged so I figured I better respond so I don't end up in trouble with the boss...
@89Suburban .... lol
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2/4 on 305/40/22s
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4/6 on 305/40/22s right before being lifted 2"
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4/6 on 285/40/22s
I loved the 4/6 drop. The only reason I changed to the 305/40s is because I wanted to try the Michelin tires and they didn't offer them in a 285/40. They did have a 295/40 but the cost was literally twice as much as the 305s. 305 = $232 each and 295 = $465 each... crazy.
After these wear out I will probably try to find some 285s and go back to the 4/6.