It's fine to use a el ecu if your going with the BBM you do need an ef/el intake rather than au (au use a bit different plumbing because they run a t map sensor rather than a separate ait sender and map sensor) you will need a fuel pressure reg to suit the ecu (xr6/ Fairmont ghia use a higher fuel pressure and the tune compensates for it) with a BBM you will have to re locate your header tank and use a ef/el t Stat housing to retain a temp sender as au have it in the rear of the head and the e series sender won't work as the au sender doesn't go into the water jacket
