Most of the time it's just the EFI but can be both EFI and motor.This is going to sound dumb, but to clarify for me... when an explorer or sn95 swap is mentioned, are you talking just the the EFI or the entire motor? I wasn't necessarily wanting to swap the motor so that is why I'm asking.
My SN95 EFI runs my warmed up 1996 351w from a van.
Tim