Cubic Inch Style Year Produced Bore Stroke
223.4 L-Head Straight 8 1933-35 3 3/16 3 1/2
208 L-Head Straight 6 1935-36 3 3/8 3 7/8
232.3 L-Head Straight 8 1936 3.25 3.50
222.7 L-Head Straight 6 1937-40 3 7/16 4.00
248.9 L-Head Straight 8 1937-49 3.25 3.75
239.2 L-Head Straight 6 1941-54 3 9/16 4.00
268.4 L-Head Straight 8 1950-54 3 3/8 3.75
194.5 (1/2 389) INDYFOUR 1961-63 4.06 3.75
215 Overhead Valve 6 1964-65 3.75 3.25
230 Overhead Cam 6 1966-67 3.87 3.25
250 Overhead Cam 6 1968-69 3.88 3.53
287 V-8 1955 3.75 3.25
316 V-8 1956 3.94 3.25
347 V-8 1957 3.94 3.56
370 V-8 1958 4.06 3.56
326 V-8 1963-67 3.781 3.750
350 V-8 1968-77 3.875 3.750
389 V-8 1959-66 4.063 3.750
400 V-8 1967-79 4.120 3.750
421 V-8 1961-66 4.094 4.000
428 V-8 1967-69 4.120 4.000
455 V-8 1970-76 4.150 4.210