Please bear in mind that depending on how high up you are jacking for the height of where you want the top of the jack stand, when you drop rig to that stand, you should always have a block in front of both tires at the other end of the rig. If you have no block at the front, let's say, and the jack stand is high enough, that rig can shift on the frame and jack stand touch point and shift and be very very dangerous. The steeper the angle the more chance of that happening. Even if you are jacking the front and the trans is in park and the park brake set, I would still block that set of tires. Even if you block a front or rear axle, if the angle is steep enough, the pressure can spit the jack stand out from under it even if the rig does not roll forward or backward. When I wanted to go real high, I would set stands at both ends and go up in increments. Sucks compared to two post 4 contact lift or my favorite, a drive on rack with air jacks under it that can lift the rig at either or both ends and elevate the tires from the drive on ramps/rails.