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Cylinder Head Casting Numbers for Big Block Chevrolet

Casting
Number 

Year 

ValveSizes 

HP 

Chamber 

Notes 

10051128  90-94  2.19/1.88  Not Listed  72 CC  400cc Symetrical intake ports Bowtie Aluminum 
14011077  89-94  2.19/1.88  Not Listed  118 CC  295cc Intake Ports Replacement C Port Aluminum 
14044861  89-94  2.19/1.88  Not Listed  105 CC  380cc Intake Ports Bowtie W Port Aluminum 
14096188  71 & up  2.06/1.72  425  118 CC  325cc Intake Port 454/502 
14097088  71 & up  2.06/1.72  425  118 CC  325cc Intake Port 454/502 
3856206  65-66  2.06/1.72  325  98 CC Chambers  396 
3856208  65  2.06/1.72  375 & 425  109 CC Chambers  Z-16/L-37 396 
3872702  66  2.06/1.72  325/360 & 390  98 CC Chambers  L-34/L-35/L-36 396/427 
3873858  66-67  2.06/1.72  375 & 425  109 CC Chambers  L-78/L-72 396/427 
3904390  66-67  2.06/1.72  325/350/390 & 400  98 CC Chambers  L-34/L-35/L-36/L-68 396/427 
3904391  65-67  2.06/1.72  375 & 425  107 CC Chambers  L-78/L-71/L-72 396/427 
3904392  67  2.19/1.88  430 & 435  107 CC Chambers  L-88/L89 Aluminum 427 
3909802  66-67  2.06/1.72  325-400  101 CC Chambers  L-34/L-35/L-36/L-68 396/427 
3917215  67-69  2.06/1.72  325-400  101 CC Chambers  L-34/L-35 396/427 
3919840  67-69  2.06/1.72  375 425 & 435  107 CC Chambers  COPO L-78/L-71/L-72 396/427 
3919842  68-69  2.19/1.88  375/430 & 435  107 CC Chambers  L-88/L-89 Aluminum 369/427 
3931063  69-70  2.06/1.72  325-400  101 cc Chambers  L-34/L-35 396/427 
3946074  69-71  2.19/1.88  375-465  118 CC  L-88/ZL-1/LS-6/LS-7 369/402/247/454 Aluminum 
3964280  69-70  2.06/1.72  325-400  101 CC  LS-5 396/402/427/454 
3964290  69-70  2.06/1.72  325-400  101 CC  LS-5 396/402/427/454 
3964291  69-70  2.06/1.72  375 425 & 435  108 CC  325cc Intake Ports L-78/L-71/L-72/LS-6 396/402/427/454 
3964292  70  2.06/1.72  450  109 cc  LS-6 454 
3993820  71  2.06/1.72  300/330 & 365  113 CC  LS-3/LS-5 402/454 
3994025  71  2.06/1.72  425  118 CC  LS-6 454 
3994026  71  2.06/1.72  425  118 CC  LS-6 454 
3999241  72  2.06/1.72  240-365  113 CC  LS-3/LS-5 402/454 
6258723  71  2.06/1.72  425  118 CC  LS-6 454 
6272292  71  2.06/1.72  240 & 270     LS-3/LS-5 402/454 
6272990  71 & up  2.06/1.72  425  118 CC  325cc Intake Port 454/502 
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