I was just mentioning the the 285 zp will not fit on factory rims, the stiffer sidewalls in these 285's will have problems on a 9" wheel.
Indo nit use any spacers but I also have 19x11 rear wheels, I ran on stock arms for awhile, when I put on the adjustable camber arma that kicked the toe out, is when I rolled my fenders .

If you pick between a 255/35 - 275/35 there would not be any thing needed to change or adjust.

I was talking about some of the things I have done, for various reasons.

I like my wider tires, on packed snow and ice, there is nothing to cut down to, and have liked wider for more contact, more biting edges.
Changed rims, wanted wider and lighter, and between previous owner and bad tire installers they have seen better days, so new wheels
Adjustable camber arma to kick the tire out, flatten out the tread so they do wear the insides out.
With the new wheels and wider tires and kicking the top of the tire out is why unrolled the fenders.

Ask any ? You may have or if I cause any confusion.