HOLLEY LIST # INTAKE MANIFOLD # 4490 1970 Z28 auto (49 state) 3972110 4555 1970 Z28 4 sp (49 state) " 4554 1970 Z28 auto (Calif) " 4489 1970 Z28 4 sp (Calif) " 4492 1970 396-375 auto.(49 st.) 3963569 4557 1970 369-375 4 sp (49 st.) " 4556 1970 396-375 auto (Calif) " 4491 1970 396-375 4 sp (Calif) " 4800 1971 Z28 automatic 3959594 4801 1971 Z28 4 speed " 6238-1 1972 Z28 automatic " 6239-1 1972 Z28 4 speed "