I owned W30 hull #5, a 1972 Searcher. I replaced the cable steering with a hynautic system I bought at a marine bargain store. It was oversized and I ended up with 7 turns lock to lock on the steering. I did the conversion to get a better autopilot option. Was probably 25 hours of install work.
The smaller telestar systems would be fine for your Searcher. It won't be cheap and will be a sunk cost without benefit at resale. But a nice upgrade. And a nice boat.
BTW, if you haven't found the Willard Boat Owners Group, check us out on groups.io. I'm the moderator and would be happy to see you aboard (we are open to all)