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INTAKE MANIFOLDS
Part Number                                  Application                                          Type
535889                                  1960 SD 4BBL                                   Aluminum
540510                                   1960 SD 3x2                                      Aluminum
983683                                  1960 SD 2x4                                      Aluminum
544128                                   1961-62 SD 4BBL                               Aluminum
9770859                                1961-62 SD 2x4                                 Aluminum
9772128                                 1963 SD 2x4                   A/FX ( tunnel-ram type)
9775088                                1964 3x2                     Cast iron, Small carb holes
9778815                                 1965 GTO 3x2    Cast iron, Small center carb holes
9784440                                1966 GTO 3x2     Cast iron, All carb holes are large
FROM 1967-79 ALL 4bbl INTAKES USE A QUADRAJET CARBURETOR
9786285                                1967 GTO                                              Cast iron
9799068                                1968-70 4BBL                                       Cast iron
THE FOLLOWING INTAKES ALL HAVE TALL RUNNERS
9799084                                1969 F, 1970 RA IV                             Aluminum
9796614                                 1969 A, RA IV                                      Aluminum
483674                                  1971 455 HO                                        Aluminum
488945                                  1972 455 HO                                       Aluminum
494419                                   1973 455 SD                                  Cast iron EGR
495103                                   1974 455 SD                                  Cast iron EGR
9796395            1969-70 RAIV, 1971 455 HO  Exhaust crossover for 65-71 heads
488983                                  1972 455 HO      Exhaust crossover for 72-76 heads
THE FOLLOWING INTAKES HAVE TUNNEL-PORT RUNNERS
546458                                  1969 303 RA V                         For short deck block
545288                                  1969 400 RA V                                     Aluminum

THIS INFO GATHERED FROM "PONTIAC HEAVY-DUTY PARTS & SPECS" FROM H.O. RACING SPECIALTIES, INC.