this is the original system which is a great unit for a searider its a Teleflex Big T Helm and Bezel..it does make the steering incredibly easy with out having to take the Hyd route which in general is an overkill for a 90,
I have the system as specced by Matt on my 5.4 with 90 horses and it's easy to handle. I think hydraulic would just be more things to go wrong for you. Just my opinion.