Autopilot for 1990 Alpha One Cable Steer I/O?

[Gezellig]

Hello, I have a 1990 Searay 220OV with a cable steer power assisted Mercruiser Alpha One Gen 1 I/O drive. I am considering installing an auto pilot in it this year. It looks like I would need to purchase the EV200 system along with a steering actuator. Does anybody have any experience with a similar setup? The M81138 Electromechanical Drive says that it is for 1997 or later. I can only find a handful of places to purchase this and it looks like you have to specify what your drive is to get the appropriate brackets for install. I am also seeing some websites saying that it is for 1987 and newer I/O's but nowhere do I see a spot to specify this. I am trying to figure out my options without having to convert the boat over to hydraulic steering.