Newly designed abs plastic fan shroud is engineered to replace the original steel fan shroud and provide more air flow and greater cooling efficiency than the original shroud. Our new design is thicker than Other models and has a special flanged edge that creates structural strenGTh not offered through previous models. The original metal shroud is less than two inches in depth, our newly designed shroud is a full 3 1/2 inches which greatly increases cooling efficiency. May require minor trimming on cars with power steering and air conditioning. Must use stock 17" Fan blade. These are an all new design, improved for strenGTh and cooling. A Dearborn Classics exclusive! The height is 19 1/2 inches, width 19 1/4 inches. The distance between the bottom bolts is 18 1/2, distance between the top bolts is 18 1/4, distance between the top bolt and bottom bolt is 10 1/4 and the hole, which is the diameter of the opening of the shroud is 17 1/2.Replaces Ford part number #c3dz-8146-dapplication: 64/66 Mustang (6 & 8 cylinder)63/65 Falcon/Ranchero/Comet (6 & 8 cylinder)