These new reproduction copper cores feature the correct upper and lower channels with the holes punched and the dimple in the center. Simply have your local radiator shop transfer the stock end tanks to the new core. You may also send us your radiator and have one of our technicians restore the radiator. This part (BC2) is 22.5" wide and was used on all 1966-68 Big block and 1968 small block with automatic transmission.