Pontiac engine bore & stroke sizes

Cubic Inches     Bore (inches)       Stroke (inches)     Main Journal size (inches)     Rod Journal size (inches)
265                    3.75000                 3.0000                   3.000                                2.250
287                    3.75000                 3.2500                   2.500                                2.250
301                    4.00000                 3.0000                   3.000                                2.250
303                    4.1250                   2.8400                   3.000                                2.250
316/317              3.93750                 3.2500                   2.500                                2.250
326                    3.71875                 3.7500                   3.000                                2.250
347                    3.93750                 3.5625                   2.623                                2.250
350 (354)            3.8750                   3.7500                   3.000                                2.250
366                    4.1530                   3.3750                   3.000                                2.250
370                    4.06250                 3.5625                    2.623                                2.250
389                    4.06250                 3.7500                    3.000                                2.250
400                    4.12000                 3.7500                    3.000                                2.250
421                    4.09375                  4.0000                   3.250                                2.250
428                    4.12000                  4.0000                   3.250                                2.250
455                    4.15000                  4.2100                   3.250                                2.250