I finally bought the front suspension off of an 81 Z28. During installation, how do you establish the end stance of the truck (56 F100)? I recently read an article call Camaro-ize the F100. It said for a slammed stance during the install process set the framerails: 11 inches to floor at the centerline of the front axle; 12-12 1/2 inches to floor further back right before frame starts is rise over the rear axle; 16-16 1/2 inches at the rear and 9 inches at the underside of the front crossmember/core support. I don't want a complete slam just something in between. Also, do you have to know what rear axle you will install at the time of the front suspension installation? Thanks, Jerry, Eugene, Oregon