I Currently have my 2013 Silverado leveled on 18x9s and 285/65/18s. I'm getting ready to add on the spindle source spindles, Rough Country UCAs, and bilstein 5100 in the rear. i really want to install 20x12 and 33s and I'm wondering how bad the rub will be. I'm also wondering if i were to mount 305/50/r20 (32x12.5r20) if i would still rub. is there anything else i would need to order for the lift, and how hard is it to install the spindles and ucas. i have read the 147 pages of a thread dedicated to this subject but I'm still a little weary on this setup.