3" lift on a 2008 tundra?

my friend has a 2007 or 2008 not sure but he want to put a 3" leveling kit on it and was wondering what are the biggest 18" tires he can run on it without rubbing?

MY TIRE GUY SAYS THAT A 325-60-18 SHOULD FIT NO PROBLEM.THATS THE TALLEST HE SUGGESTED. THEY HAVE DONE SEVERAL LEVEL KITS ON THEM AND HAD NO ISSUES.HOPE THIS HELPS

cool thanks