yea i would say to get a mesument of the wall from one end to the other gat a truss or beam and you will have a 12" drop were the beam is and on each end were you suport it
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[size="4"][font="Georgia"]02 3500 4x4 6spd silincer ring mia,5"turbo back, edge juice and afe stage1, 235 general at2 running 2 cycle now