I have seen several 70 440 HP blocks that were cast 3-4 months ahead of the engine assembly date. My 3/5/70 SPD 70 GTX has a block cast date of November 1969....the exhaust manifolds & water pump housing were also from November. I would not be surprised to see even wider spreads in cast dates versus assembly dates.


70 Road Runner 383-4 4 speed FJ5 & black guts
70 Charger R/T 440-4 4 speed FJ5 & white guts