Could put a oneway drain into the OB well at your inside's lowest point. Could build that low point up a bit with epoxy filler so that low point will always stay drained. How about a teak or mahogany slatted deck replacement so you can have a place to sit gas cans, lunch hook, line, OB wellhole lid. etc?

I remember the pungent odor of gasoline when the lazarette deck was being removed!

You gotta seal that bulkhead there!!!

If you are not racing, where does the OB live when not in the hole?