I have the Vision Legend 5 lug wheels on mine. 17x8 front 4.5" bs and 17x9 5" bs. On a stepside you need the wider later axle for that to work with big tires.
I have 235 55 17 on front and 275 55 17 rear.
My truck is 4.5" drop front with 2.5" spindle and 2" spring and leaf spring flip in the back that dropped it 7 1/4". I ran the ECE conversioni brake setup with their master, metering block, T fitting and hoses.
If I were to do it all over again: I would do exactly the same thing.