I have a Catalina 30 1977, I want to re-power with a new engine actually has a Yanmar 12hp single cylinder, Yanmar has a new engine 19hp but I don't know if this new one will fit the actual space. I would like to know if there is another engine that can fit the actual space without make any major modifications. Please submitt my note to the owners to see if someone have an answer. I will apprecite your help. Thanks very much