My truck sits at exactly the same height up front with 235/75-15s. I have zero rub issues- but(there's always a but) I am running the 7" wide van rallies(look just like the truck rallies- but narrower) up front. This pulls the tires in a little and keeps them from rubbing the fenders.
If you were to use a shorter tire, you would start getting the lower control arms closer to the ground- which if you look under there- does not need to happen.
You've got the perfect height right now, tuckin' just a little tire, you just need to swap to a wheel with a little less width and more backspacing. There is also a 6.5" wide van rally found on some of the late '80s fullsize vans.
Good luck with your project.
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-Chris
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