if you can't see the boat, an it's a custom build, ask them for all the distances. Console to tube edge, seat to console, seat to seat, etc. Then try to imagine if those gaps are big enough to move round the boat or whatever.
The last boat i ordered had quite a long seat pitch (console to seat) which meant anyone under about 6' couldn't have driven sitting down! Only spotted it when we sat in another boat.
just my 2p