Tim, looks like from what E410Kid posted, they're going to use the same body/pump/tank specs that the current E410 has.
Taylor Goodman
Captain - Henrico County (VA) Division of Fire
Fire Chief - Huguenot VFD, Powhatan, VA
Captain - Henrico County (VA) Division of Fire
Fire Chief - Huguenot VFD, Powhatan, VA