How much height did you add with the lift and the 285s? I only have 4.5" before I run out of space in my garage.
2.5 - 3 up front with the spacers, and 1/2 - 3/4 inch from the tires (31.6 stock -- Falken says the 285 is 33in, but it's at least 32.7 or so)
So 3.00-3.75 inches total. You'd be close, but should be ok.