After seeing a lot of questions regarding casting numbers, here's two pictures with the casting numbers of all years and all blocks from 289 to 351 Cleveland. I will eventually add in pictures for deciphering the codes, I.D. tag codes, general data, crankshafts, Ford Racing crankshafts, flywheel/flexplate, harmonic balancer, cylinder heads, intake manifolds, mass air conversion kits, distributors, generators, pulleys, alternators, starters, thermactor system, radiators, water pump, fan, and if there's a demand I can do big blocks too.