Nothing before 1955.will bolt up.
1957 and 1958 Non-super quiet will bolt up but are different inside.
28-33hp will bolt up but are different inside
25hp Gale 1955-63 will work (possible slight differences inside)
35-40hp Gale will bolt up but are different inside
EDIT: Correction: 28hp are same as Gale 25 and will work (possible slight difference inside) 33 definitely different inside
