I don't believe the PBX will let you built up the phantom superloop to support those card slots.
On older option 11s you can build up superloops 64,68,72,76,80 to give you access to card slots 41-60
On newer option 11s you can build up superloops 96,100,104,108,112 to give you access to card slots 61-80.
(preceed the loop number with an "N" to denote Phantom)
Once you have the superloops built, then you can start building phantoms on the "card slots" mentioned above.
Arch