I have the same issue with my 29' Amberjack with 5.7's. I was told by a marina that the kit to convert the two engines to power assist is no longer available and they didn't have a solution. I'm in the process of converting to hydraulic steering, but it's not as simple as I thought it would be.
I have the same issue with my Amberjack and was told that the kit to convert both engines to power assist steering is no longer available. I'm in the process of installing hydraulic steering and that isn't turning out to be as simple a I thought it would be.