Pontiac V8 Displacements

 
 

 Year

Displacement

Bore in inches

Stroke in inches

 Mains in inches

   1955

287

3.75 3.25 2.50
   1956

317

3.9375 3.25 2.50
   1957

347

3.9375 3.5625 2.623
   1958

370

4.0625  3.5625 2.623
   1959-'66

389

4.0625 3.75 3.00
   1963-'66

421

4.09375 4.00 3.25
   1963-'67

326

3.720 3.75 3.00
   1967-'69

428

4.120 4.00 3.25
   1967-'79

400

4.120 3.75 3.00
   1968-'77

350

3.880 3.75 3.00
   1970-'76

455

4.150 4.21 3.25
   1977-'81

301

4.00 3.00 3.00

 


 

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