I saw your post while I was looking around for insight on my 42' Irwin Center cockpit ketch that I'm trying to fix up to sell. I can tell you that it has lots of head room - my former partner was 6'2" and that's exactly why we bought the boat because he refused to buy a boat he had to duck in. I'm looking to sell it if you're still looking to buy. She needs a bit of work however, and due to my relocation to help manage my parents' illnesses I can sadly no longer maintain the boat. Let me know if you're interested.
Thanks
Kat