I doubt that there is enough room for that big HDSi transducer on the step and I don’t know how well it would work where the original transducer is since that is a stepped hull. I would try it where the factory one was and if you don’t get high-speed depth readings I would maybe try a XSO-9-20-T Stick-On transducer under the hull just off to the right or left side of the keel (so it is a few inches to the left or right of the motor).