Not possible to have a 90 degree looper powerhead inside a 60 degree 175 HP cowling.----Powerhead to exhaust housing gaskets appear to be different as well.----Any pictures ????
That 22 cubic inch block was built from about 1957 to 1976.-------In 1969 they bumped it up from 18/ 20 HP to 25 HP.----They offered it as 20 and 25 HP up to 1976 model years.----Just a great lightweight motor.