The ECU is on the left (driver's) side, in the aquarium (between the false bulkhead and the real bulkhead).  Remove the aquarium cover ( cover at the back of the engine compartment, 8 each 8mm screws).  For better access, remove the false bulkhead (instructions).  Remove the clip that secures the antilock ECU and pull the antilock ECU up, forward and out of the way.  Remove the two 8mm screws from the mount plate in front of the F.I. ECU.