Here’s my follow up to my previous posts about tire sizing and clearance posted on Jan 4th. Upon further inspection my car already had 20 mm spacers in the rear which worked perfect for a 15x8 with 4.5” backspace. It’s a tight fit with the mickey Thompson et streets 275/60/15 but shouldn’t rub much if any at all. About an inch between the tire and leaf spring. Thanks to everyone for the help!