2020 Fx2 lift questions

[Xpressman]

I just purchased a 2020 fx2 and have been looking at 3-3.5 inch suspension kits. Eibach pro truck with springs and rear blocks, or bds, superlift uca kits.
My truck has the cast steel spindles so no one is sure the upper control arms will work. Is there a difference in balljoint stud diameter orr taper between a 4x2 and 4x4?
I don't want to go any shorter than 3 inches and the plan is for 255/80r17 on factory magnetic wheels with a 1-1.5 inchhub centric spacer. Purely a driver with no offroad use

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[Xpressman]

So took a trip to the dealership and out of 11 rangers, all but 4 were 4x4, all have black cast steel spindles.
Not sure why rough country has a note that their kit only works with the aluminum spindle. Also a lot of the pictures here and on the web show an aluminum spindle.
I'm going to order a uca lift kit and see how it goes.