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Im not sure about replacing anything MORE than that. I know I just recently replaced ball joints all around as well as my tie rod ends and I've been fine.
I just gotta say your truck looks beast!! Way ta go!
You could always check your wheel bearings and seals; spindle bearings and seals; and axle shaft u-joints since you'll have the knuckles off. You won't necessarily need to replace them, but if they're questionable, now's the time to do it.