Looking at a redeye JFK-SFO flight in late November that's currently showing the D1 75S config. My understanding is that these are being rapidly converted over to an updated 75G style (recliners) per this thread.

Is it more likely that this flight will upgauge to a 763 or just swapped in place to an updated 75G? Would be screwed if I couldn't lie flat for this flight. Thanks for any help!