an FS-ZE ECU will not work on a US spec car unless you do a TON of wiring.
^Were you still able to get all the hp out of the engine without the ECU to take advantage of the HC pistons and the different cams/intake manifold? If so, did you use a standalone?
Seems like a standalone is a better investment then the FS-ZE. I've seen results with mostly stock FS-DE's put down 130hp after a pro dynotune.