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BBC Intake Manifold Casting Numbers

ALUMINUM RECTANGULAR PORT - Holley 4V
 

Casting Years CID HP/RPO/Config
3866963 1965 396 375, 425 L-37
3885069 1966-68 396 375 L-78
    427 425 L-72
3886093 1967 427 430 L-88
3894374 1967 427 435 3x2 L-71
3894382 1967 427 400 3x2 L-68, oval port
3919849 1968 427 390 L-36, oval port, Qjet
3919850 1968 427 400 3x2 L-68, ovat port
3919852 1968 427 435 3x2 L-71
3919878 1968 396 375 L-78
    427 425 L-72
3933163 1968-69 396 375 L-78/L-89
    427 425 copo
3933198 1968-69 427 430 L-88/ZL-1
3937793 1968 427 390 L-36, oval port, Qjet, Late
3937795 1969 427 400 3x2 L-68, oval port
3937797 1969 427 435 3x2 L-71
3947801 1969 427 390 L-36, oval port, Qjet
3963569 1970-71 396/402 375 L-78/L-89
    454 LS-6, lowrise
3967474 1971 454 425
6269318 1972 454

BBC Intake Manifold Casting Numbers

IRON OVAL PORT - Rochester Q-jet 4V
 

Casting Years CID HP/RPO/Config
336789 1974 454 235, 270
346242 1975 454 215
353015 1973 454 215, 245
393841 1973-75 454 215
3856289 1965-66 396 325 L-35
3866948 1966-67 396 325, 360 L-34/L-35
    427 390, Holley
3883948 1966-68 396 325 L-35
    427 385, 390 L-36
3931067 1969 396 325 L-35
    427 335, 390 L-36
3952900 1969 396 265 2V
3955287 1970-71 402 300, 330, 350 LS-3
    454 360, 365, 390
6263753 1972 402 240 LS-3
    454 240, 270