Roller:

Take every bit of the fuel system from the donor, all the way from the tank exit forward.
The fuel supply piping will have to be upgraded for the pressures involved (90psi), and a sufficiently large return line will have to be provided.
If the donor has a KE-jet system, then that will require its computer and harness, and all the relays, and the O2 sensor. If it is a K-Lambda system, that is a bit simpler, in that there is less wiring.

Take the whole ignition system.