As said a bolt on deal & check (hose routing/location). On your '70 if the hard line locating tab if it is in front or behind the spindle as F body calipers MAY have a more advantageous hose mounting location on the caliper than A body ones for the best hose routing. Get an idea of what you need & have your parts house set out both of em to compare. EDIT and related to hose routing, the spindles/calipers can be switched for side to side. Mock everything up & get the best fit you can.