The issue is the stock wheels are only 7.5" wide. The stock wheels have 6" backspace... so with your 1.5" spacers you're basically running 7.5" wide wheels with 4.5" backspace. These level 8 wheels that are 9" wide with 5" backspace will stick out 1" further than your current setup. Turn your wheel to full lock and see how close they get to the firewall (keep in mind if your tires are worn that'll make a significant difference).