I've found the best way to check the actual height is to hook your 32 up to your truck, jacks up like you're ready to roll. Lay a 2x4 on edge or something long and straight across the front A/C extending over the side of the 32. Have someone with a tape measure from the 2x4 to the ground. It's easier for them to grab the top edge of the 2x4 with the tape and then you subtract 3 1/2" from the total. Or if you're like me you don't subtract and use that as a cushion.