What type of steering do you have now? Regular push/pull teleflex cable type? If so, why is it that you want to convert to hydraulic? The engine is only a 90hp, I just don’t think you will gain much in terms of control/ease of steering going to hydraulic.
In any event, I would just consult the teleflex accessory book, I’m sure the kit part numbers are spelled out clearly there. Keep in mind that some of these units are a little bulky, along with the hydraulic hoses that are flexing around, so transom well dimensions and clearances should be considered…