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Intake Manifold Casting Numbers for Big Block Chevrolet

Casting
Number 

Carb 

Year 

HP 

Notes 

3866963  4-Brl  65  375 & 425  Aluminum L-37 396 Holley 
3885069  4-Brl  66-68  375 & 425  Aluminum L-78/L-72 396/427 Holley 
3886093  4-Brl  67  430/340  Aluminum L-88 427 
3894374  3X2  67  435  Aluminum TRI-power 427 
3894382  3X2  67  400  Aluminum Oval Port TRI-power 427 
3919849  4-Brl  68  390  Aluminum 427 Q-JET L-36 Oval Port 
3919850  4-Brl  68  400  Aluminum 427 Oval Port L-68 
3919878  4-Brl  68  375& 425  Aluminum L-78/L72 369/427 
3933163  4-Brl  68-69  375 & 425  COPO 396/427 l-78/l-89 Aluminum 
3933198  4-Brl  68-69  430  L-88/ZL-1 Aluminum 427 
3937793  4-Brl  68  390  L-36 Oval Port Aluminum Q-JET 
3937795  3X2  69  400  Aluminum TRI-Power L-68 Oval Port 427 
3937797  3X2  69  435  Aluminum TRI-Power L-71 427 
3947801  4-Brl  69  390  Aluminum L-36 Oval Port Q-JET 427 
3963569  4-Brl  70-71  375 & UP  L78/L89 & LS-6 Low Rise 396/402 & 454 
3967474  4-Brl  71  425  Aluminum 427 
6269318  4-Brl  72  Not Listed  Aluminum 454 
3866948  4-Brl  66-67  325/360/390  L-34/L-35 Holley 396/427 
3883948  4-Brl  66-68  325/385/390  L-35/L-36 396/427 
3931067  4-Brl  69  325/335 & 390  L-35/L-36 396/427 
3955287  4-Brl  70-71/ 300-390  402 & 454    
6263753  4-Brl  72 240/270  402 & 454    
3856289  4-Brl  65-66/ 325  L-35 396    
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