I found a list online of evinrude models by year and HP.
These are the 60hp models by year.
https://www.marineengine.com/parts/model_guide_pre80.html#e60hp
Year Model
1964 60432
60433
60452
60453
1965 60532
60533
60552
60553
1966 60632
60633
60652
60653
1967 60732
60733
60752
60753
1970 60062
60063
60072
60073
1971 60162
60163
60172
60173
These are the 60hp models by year.
https://www.marineengine.com/parts/model_guide_pre80.html#e60hp
Year Model
1964 60432
60433
60452
60453
1965 60532
60533
60552
60553
1966 60632
60633
60652
60653
1967 60732
60733
60752
60753
1970 60062
60063
60072
60073
1971 60162
60163
60172
60173