livewell in a 85 23 SF ??

[FAS]

I have an 85 ,23' center, and am doing an extensive restoration over this winter.I'm ready to put the new floors down, and want to put a nice livewell somewhere??when I got the boat,the aft hatch was glassed over all the way to the console, so I don't know how that aft section worked.I plan on putting two batteries,and an oil tank back there up near the aft tank bulkhead.every thing below the deck is close to the waterline,and I am not sure if an under floor livewell will drain properly.also there is no hatch,never was,in front of the console on the floor.need advice soon,as I want to keep moving on this...any and all ideas are welcome.