Have the seller measure it from the ground and tell you, then you'll be right on. I believe I use a 2" drop with my Tahoe so you should be fairly close, you might need a bit more. Don't know if the newer ones have 13 or 15" wheels.
Or yeah, just pick one up at Walmart or HD when you are there, if it looks skewed in the parking lot you can just turn around and return it for a different one. Osseous must be that guy rolling down the highway with his trailer all crooked nose down since he doesn't like to crank
. I just want it level. With a swing away jack it's not an issue.