And thus they were full members of the body of Christ, and the Holy Spirit was placed within each of these believers before the Day of Pentecost.
This is one of those questions that really cannot be answered with any certainty. If Eph. 1 informs us that they were chosen before the foundation of the earth, then we are not so much trying to determine what moment the individual goes from death to life, but are they among the elect? If they are, they will undoubtedly be raised up on that day.