I installed a 2 inch rough country leveling kit on the front of my 2wd 2017 tx edition sierra in hopes that it wouldn't ride with the nose down like a bulldozer anymore and also with the hopes to be able to fit some 275/65r20 ridge grapplers on My factory wheels...tire shop called me after I ordered the tires and dropped it off to be installed and said it was rubbing on the sway bars is I believe what he said...first question is why is it still no much higher in the rear still?...on the tape measure it's still 2 inches higher in the rear....second question-if I lift it another 1/2 inch will it help fitment of the new tires without wheel spacers?.