Year	Engine	Hp	Code	Valve	Misc
1955	287	173-180-200 HP	518024	1.78/1.50
1956	316	192-205-216-227-285 HP	522010	1.78/1.50
1957	347	227-244-252-270-290 HP	523298	1.78/1.50
1957	347	317 HP	524852	1.78/1.50	Fuel Injection
1958	347	240-338 HP	528511	1.78/1.50	stamped X denotes tri-power,2 X's denote fuel injection - stamped O to right denotes HD springs
1959	389	215-345 HP	531395	1.88/1.60	stamped X to left of center head bolt - 10.5 cr stamped O to right denotes HD springs
1959	389	368-373HP	540306	1.92/1.60	69 cc SD head
1959	421	368-373HP	540306	1.92/1.60	69 cc SD head
1960	389	368-373HP	535461	1.92/1.60	69 cc SD head
1960	389	215-348 HP	536109	1.88/1.60	stamped X to left of center head bolt - 10.75 cr stamped O to right denotes HD springs
1961	389	all	538177	1.88/1.60	69
1961	421	all	538177	1.88/1.60	69
1961	389SD	385,405HP(62)	540306,544127	2.02/1.76	67
1961	421SD	385,405HP(62)	540306,544127	2.02/1.76	67
1961	389SD	368,373HP(61)	540306	1.92/1.66	69
1961	421SD	368,373HP(61)	540306	1.92/1.66	69
1962	389	all	538177	1.88/1.60	69
1962	421	all	538177	1.88/1.60	69
1962	389SD	385,405HP(62)	540306,544127	2.02/1.76	67
1962	421SD	385,405HP(62)	540306,544127	2.02/1.76	67
1962	389SD	368,373HP(61)	540306	1.92/1.66	69
1962	421SD	368,373HP(61)	540306	1.92/1.66	69
1963	389	215,230,235HP	543796	1.88/1.60	8.6 c.r.
1963	326	250HP	543797	1.88/1.60	8.6 c.r.
1963	389	267,283,303,313HP	543797	1.88/1.60	10.25 c.r.

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