How many torque boxes does a '70 Mach 1 fastback have? The reason I ask is because Im buying all my sheet metal and while under the car I noticed there was rust in the front and rear of the floorpan where it slopes down (the pieces are connected to the floorpan, not the floorpan itself). Is there a drawing/diagram that shows all the body pieces of a 1970 Mustang? I can tell what pieces need to be replaced, but Im not sure what they are called! Thanks.