Quarerberth lengh: Triton, Cape Dory, Columbia, Bristol Corsair

[westwinds]

I am going to buy a sailboat that has 6' or more headroom with a beam of 8' 6" or less. I am 5' 11" tall and have a pickup that will tow 10,000. My greater problem is finding a sailboat with a quarter berth that will sleep someone 6' 4" tall as that is how tall my stepson is. Headroom is difficult to find, berth length is impossible it seems. If you are familiar with any of the following sailboats, check and see if I got the headroom correct and let me know how long the quarter berth is.

Pearson Triton 6' headroom
Cape Dory 25D 6' headroom
Columbia 24 6' headroom
Bristol Corsair 24 6' headroom
Columbia 26 headroom 6' 1"
Cape Dory 26 headroom 6' 1"
Cape Dory 27 headroom 6'
Columbia 29 (Columbia MK I) last produced in 1965 6' headroom