a nice intake manifold off a 396 or 427 325 350 385 390 or 425 HP motors. could be Camaro Chevelle Nova or full size...all use the same manifold. part number is 3883948, and the date code just says J 3. I don't see a year code at all, but this was removed from a 1967 block. this part number was used from 1965-1969 with Rochester Quadrajet.