What am i missing here?

ok, i just looked at the diagram, and the plate i am talking about is called the 'TORQUE SHAFT BRACKET"..IT IS ON THE INNER LOWER FENDER WELL. WHAERE DO I GET THIS PLATE? WOuld it have to come off a straight gear car? or would it still be on the body, even if it had a auto trans? i am putting a 340 and 4-speed in a 71 scamp that was a /6 auto