I think they will work
I would think they would work. If anything, a couple of 2X8's to ease the car up on the ramps would work. However, with the two piece long ramps I think you would be fine. I would imagine there are folks on the site who have them. If not, I know there are many on the corvette forum who use them and really like them. You might scrape the air dam in front but not by much. If you do not get any responses here, do check the other forums as they show pictures of members' cars going up and on the ramps and state what their clearances are. If a vette with 4.5" of clearance will make it then so will the Z.