I think BobW has it. Even when you run a T spring like your in an A rossmember it will cradle it like he was saying. Remember being off a 1/16" at the center clamp will be about 1 1/2" off at the end of the spring. When you do the mounts on the axle they should be a little wider than the resting spring. Then you need to stretch/flatten the spring to mount it to the axle. I would mountit to the axle first, then center it and tighten the mount on the frame. Just my $.02