Olds bore & stroke
Engine Year Bore Stroke Cubic
215 '61-'63 3.500 2.800 216
260 '72-'83 3.500 3.385 261
303 '49-'53 3.750 3.438 304
307 '80-'86 3.800 3.385 307
324 '54-'56 3.875 3.438 324
330 '64-'67 3.938 3.385 330
350 '68-'80 4.057 3.385 350
360 4.116 3.385 360
371 '57-'73 4.000 3.688 371
394 '59-'64 4.125 3.688 394
400 '65-'67 4.000 3.975 400
400 '68-'70 3.870 4.250 400
403 '76-'87 4.351 3.385 403
425 '65- '67 4.125 3.975 425
455 '68-'76 4.125 4.250 455
Engine Year Bore Stroke Cubic
215 '61-'63 3.500 2.800 216
260 '72-'83 3.500 3.385 261
303 '49-'53 3.750 3.438 304
307 '80-'86 3.800 3.385 307
324 '54-'56 3.875 3.438 324
330 '64-'67 3.938 3.385 330
350 '68-'80 4.057 3.385 350
360 4.116 3.385 360
371 '57-'73 4.000 3.688 371
394 '59-'64 4.125 3.688 394
400 '65-'67 4.000 3.975 400
400 '68-'70 3.870 4.250 400
403 '76-'87 4.351 3.385 403
425 '65- '67 4.125 3.975 425
455 '68-'76 4.125 4.250 455