Tony, you don't say what motor you have, but if it's an OMC/BRP motor, I suspect the width of the splashwell isn't the problem as some have mentioned. The issue is the width of the transom cut-out, since the tilt tube is in the plane of the transom, as shown in following picture. I know the Merc tilt tube is located forward of transom, but don't know where it is on the other motors.
When you have a narrow transom cutout like I had on my original engine set up shown here,
there isn't much room next to the motor in the plane of the transom. I think what you're saying is that there isn't enough room for the brackets which mount to the tilt tube on the Sea Star system. The Sea Star system wasn't available in 1977 when I went looking for a hydraulic steering system, so I rigged up this system that I described earlier, which mounts the hydraulic cylinder below and forward of tilt pin and connects to motor with a pivoting/rotating SS link:
You can have my old Hynautic system if you want it, including the helm unit and reservoir for whatever it would cost to ship it, probably about $20-25. I still have the original installation manual, so about all you'd need is the nylon tubing and some compression fittings, and the pressure gage on the reservoir probably needs replacing, as it looks pretty rusty. The hydraulic cylinder mounts under stbd seat, so it's protected from salt water and is in great shape. The bracket is more robust than I remembered . . . the angle bracket was made out of 1/4" stock; I installed a grease fitting on the tube and the rod inside still moves freely. I had zero problems with the whole system for about 30 years and it was working fine when I removed it about 4 years ago.