My 1993 36 has a slight bump up earlier
boats didn't have. I've got just 6' of standing
headroom in the middle. I'm 5'11" and my
head brushes the overhead at the steps. I measured 6'7" in the hulls at the steps, dropping down to 6'1" in the forward cabins.
If you took out the hanging lockers in the staterooms and used the space for a transverse berth, it could be significantly longer that a full
bed. I actually posted those numbers somewhere, but I've slept since then. Maybe I'll have a junior moment soon.