I just put the sub frame and rear end/leaf springs back on my '69 SS350 after restoration. The back end sits high: about 15" from the ground to the bottom of the rocker panel, and 31" from the ground to the cnter of the rear whell well. While nothing else has been reassembled, I can't see what will bring the back end down. The multi leaf springs are original and haven't been modified and the car sat at a normal level prior to disassembly. Any ideas?