Ford 2300 Cast Iron Cylinder HeadD-port - Closed Chamber Deck .130Stainless Big Valves 1.89 & 1.60Port Work is the Best of The BestGot in a trade Head has a few numbers in front tower not sure what they mean. But head ran circles around the competition. Comes with Powder Coated Lime green valve cover big breather,Race Engineering timing tensioner and Esslinger cam pulley SHS 550JP