I assume you are trying to use a push pull type steering.
You may not get a response here if no one has the experience of installing one on a Rocket.
The problem of getting the push pull type system to work on the barrel back style boats without butchering the look of the tumble home leads almost everyone to use the original type of cable and pulley system which works really well if installed correctly and is very reliable and low maintenance.
“The days I keep my gratitude higher than my expectations, I have really good days”
From Mother Blues, Ray Wylie Hubbard