I edited my previous post. It looks like mine was an Aug 28 for a Dec 9 SPD although the 2588 could be a 2688? That would make more sense. The second digit is not stamped cleanly. The main parts except the block are mustn't within one month of the EAD. The left head is 11118 and the passenger side is 11218. Everything seemed to be untouched except for plug wires, neg battery cable and lower rad hose. It still had all the A/C lines, compressor and a/c stuff in the engine compartment. It came with a 4 speed D 8 carb on it? I found an H 8 and gave my D 8 to a friend. The 4 speed is stamped PP.....2692 which is Dec 10 if that's the 10000 date? The K frame is stamped 3238 2.