If I get a new or second hand bcm for an EF 94 Ford Falcon, what else needs to be replaced?

From my understanding if you want a drop in fit you would need the BCM (same color as your original) ECU and ignition barrel.

IF you just get the BCM make sure its the same color as your original one change it over put your drivers window down and leave your ignition on for not sure if its 30 or 60 mins. after this time the door locks should cycle and the BCM should be mated to the ignition barrel and your ecu.

I'm sure someone will correct me if i'm wrong