[2010SSRSM6]

It looks like it's your cross brace under the h-pipe that is dragging. You shoud be good with about a 1" lip. Just make sure you can get lift off the front end and still keep the boards inside the garage. It doesn't look like you are getting to far past the point where the door closes before you are dragging. If you can't get enough lift, you will need to adjust the point your door closes so you can put the boards farther forward (closer to the curb).