The Buick decoding section contains information about:

  • General Engine specs – bore/stroke, firing order
  • Engine codes
  • Skylark Production numbers

Firing order: Buick (most V8 except HEI): Clockwise 1-8-4-3-6-5-7-2

 

CID Year Bore X Stroke
300 64 – 67 3.75 X 3.40
340 66 – 67 3.75  X 3.85
350 68 – 80 3.80  X 3.85
400 67 – 69 4.04 X 3.90
401
425 63 – 66
430 67 – 69 4.1875 X 3.90
455 70 – 76 4.312 X 3.90

 

 

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