hi guys im restoring my 87 z it id lower 1.5 in front 1 inch in rear i jusr bought a set of oe replica iroc rims 18x8 i was wondering what tire size would be the best to use i was told 245/40/18 but i was wondering if these tires would cause any issues up front , but i would like to run larger tires in rear to fill out rear wheels what tires size would anyone recommend without causing any concerns thanks sheldon