Denr, I think you have the Gulfstar 37 confused with other boats in their line. The 37 is a classic sailboat, no coachhouse. Gulfstar made a bunch of motor cruisers and sailboats that could have been called motor cruisers. But the 37 isn't one of them. It has a fin keel, skeg hung rudder, and a very nice layout for its era.
I've spent years sailing one. First the pluses:
- Reasonable performance for a cruiser. My '77 Gulfstar 37 easily outsailed an '89 Hunter 37 on a 6 hour port to port in the Great Lakes. It's no race sled, but it performs well for a cruiser.
- Roomy cabin with tons of teak. Very pretty and comfortable if it's been maintained.
- Fairly dry boat, the long bow overhand keeps the water off the deck and cockpit.
- The boats from the late '70's, early '80's have osmosis problems. We spent a long spring peeling the outer layer of glass off the hull and recoating with West Systems epoxy.
- Over time, the lifeline stanchions leak. They'll need to be rebedded.
- The engine is a challenge to access. Monkey-like abilities are a big plus.
We loved our '37, but we finally got a bad case of 5'-itis and are moving up to a bigger boat.
I'd be happy to fill in more details if you have more questions, let me know.