Brought home a 396 that is a late 1967 motor, I think. It's marked T1221IN 18T254966 on the pad, and has L 8 7 on the side of the block. Can anyone tell me what it came out of, and if the date of production on the block is 12/8/67?

Yes the casting date is 12/08/67
Partial Vin:
1=Chevy
8=1968 model year
T=Tarrytown Ny assembly plant
254966=sequence number

Engine:
T=Tonawanda engine plant
1221=engine assembly date 12/21
IN= '68 Full size Chevrolet police L-35 396/325hp PG trans


Rene
66_Malibu

Thanks!!!