Autronic, according to the Toyota 2UZ wiring diagram, they have 8 ignition outputs going to the coils. Is that what you've planned, or are you running waste spark? I suppose even if you're running waste spark, you can pair up the coils at the end of the harness?
I'll contact Curt @ Elmhurst and ask him if there's a separate coil harness for the 2UZ in the Tundra.
Maybe Tundraeddie will chime in here, too.