For the record AFAIK: Pontiac "Big Block" displacements (CI), year
introduced Pontiac "Small Block" displacements (CI), year
introduced
287 , 1955
265 , 1980
316 , 1956
301 , 1977
347 , 1957
303 , 1969
370 , 1958
326 , 1964
389 , 1959
336 , 1963
400 , 1967
350 , 1968
421 , 1961
428 , 1967
455 , 1970
Chevrolet "Big Block"
displacements (CI), year introduced Chevrolet "Small Block"
displacements, year introduced
348, 1958
262, 1975
366, 1965
265, 1955
396, 1965
267, 1979
402, 1970
283, 1957
409, 1961
302, 1967
427, 1966
305, 1975
454, 1970
307, 1968
327, 1962
350, 1967
400, 1970
Buick, Oldsmobile and Cadillac engines were also grouped into "Big
Blocks" and "Small Blocks" but there were actually more variations among
them and therefore defy any sort of straightforward classification.
Chris - AN5L35xxx
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