Rocketeer, dont u have the ze intake maniold? the ze intake manifold has a black box on top of it, some kinda resonance chamber or something.
WRT the egr throwing a CEL, when i had the 1.6 and i installed the zl-ve intake manifold, it didnt have an egr connector, so what i did was simply melt shut the end of the egr line that connected to the manifold. No CEL thrown, drove the car for about 18 months before changing the engine and never got a CEL.
I think the 626 intake manifold is different to the ze manifold.
Also, yes, i forgot to mention, all of our cars and those from japan are fwd, but i didnt realize that the harness would need modification for your cars and also, remember since all of the ze's came out of japan, it has the mandatory speed cut at 180 km/hr, which translates to about 112-113 mph.
If an option was available, I'd get an intake manifold with single runners and no shutters etc, power availability would be superior IMO...