I have the NJ DMV information and it says and i quote" Reconstructed motor vehicles equipped with a NEW engine and Chassis will be treated as a new motor vehicle and must comply with all emission requirements applicable to the model year in which the vehicle is initially titled.
My Translation: If the car is new and the engine is new you have to pass current regulations in the year you title the vehicle.
QUOTE:
Reconstructed motor vehicles equipted with a USED or OLDER model engines shall comply with all emission requirements applicable to the model year of the engine. DOCUMENTATION FROM THE MANUFACTURER OF THE ENGINE OR A DEALER AUTHORIZED BY THE MANUFACTURER WILL BE NECESSARY TO ESTABLISH PROOF OF THE YEAR OF THE ENGINE.
What I had origionally asked was weather or not they used the cast date code such as D0VE for a 1970 ford block or if they use the numbers STAMPED INTO THE BLOCK which I am told correspond to the year of the vehicle the engine was put into. If anyone knows the answer to this I would appreciate it. Much thanks to all for helping out.