eaglespar
I don't know where the CoG's of the engines are relative to the CoG of the full aircraft, but I would hazard a guess that they're forward. If that's correct, the engines and pylons in place would have tended to make the aircraft float less nose up, tail down, but lower in the water because of the higher mass and therefore displacement.
All that is assuming the aircraft wasn't more severely damaged and possibly holed because the engines didn't detach. A hole at one or other end of the tube, a cargo door being forced open, even holes from external fittings being ripped off and all bets are off - it becomes a lottery.