23 Self-bailing deck history ?

[sokinwet]

Recently found out from the original owner that my 71 Seafari was a "sinker". Not sure how but it has the 6" brass flared tubes throught the deck. It only drains at slow speed or at rest with min. weight at the stearn; if I run with the plugs out water comes in like a fountain! When the fish box is full your feet get wet! Anyone else with this problem? Any suggestions?