As I once stated, I do not know for sure what dispensational is but it seems you believe that there will be a future rapture which is the first Resurrection.
Is that true?
Thedogmatic adherence to the deception that their is only one first resurrection is easily handled by seeing the several instances of dead being raised again to life throughout the Bible. Were these 'the first resurrection'. Well, yes, for individually each is resurrected a first time, so all of them are resurrected a first time and so shall the event of the Rapture be a part of this first resurrection. But the bodies transformed in the Rapture miracle will not be in any second resurrection for they are given immortal bodies in their first resurrection.