wrsangrey

Yes, stamping an engine code in a correct (e.g., proper part number and date code) but non-original (to the car) block is easy - done by many, and stamping a "matching" VIN is also easy - again done by many. But the result is not the same as the vehicle having its original engine which for many is a key value aspect. But determining the originality of an engine can be difficult, particularity before the '60s. As to "Changing the cast in date code..." - ever heard of JB Weld?