If you want I can go measure up mine. I have two boats, ones a 31ft full keel
on a 4post cradle, the other is a 38ft fin keel
on a 4 post cradle.
What sort of boat
are you building it for? There are 165 boats at the club, perhaps your make is one of them. I can go measure that too if you like. Also how fast do you need the info?