Which year and model is this SC 23'?

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Can someone tell me which year and model this boat is? When the rebuild was done they decided to put the livewell in front of the CC obviously to balance the boat for twin engines. But I have not seen this front fish box and floor compartment design. Can anyone shed some light on this? Plus no inside hand/guard rail. Its says SECR3126M74A, so I assume 1974...