These are a 27.30 height which is a little taller than the original E70/15 Goodyear Wide Treads (26.73 height) chosen for the Z/28, but they have a narrower tread width at 4.45 vs 6.63 so they work well on a standard height car.
Your car with a lowered stance may become an issue for this tire and wheel setup. If you're looking for a day 2 look, you might want to ditch the lowered springs and raise the car up to where it will achieve the right stance / look.
Good luck with everything.
