Hey guys, I'm new to the site. I found it through ls1tech.com. I've got an 04 Sierra RC/SB, 5.3 with no mods yet. I will be dropping it pretty soon. I'm going to go with a 4"/6" DJM kit. I would like to run Boze Stingers in 20x8.5 with Toyo 255/45 tires. Does anyone know if this will fit and what kind of backspacing I will need? Also, I know the tranny crossmember is a clearance problem, has anyone used the tranny crossmember from IF Customs? Let me know what you think.