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Doesn't the h22 come with its own ecu that controls the vtec? I don't think it really matters what u have under the hood if u want to swap to a completely diff engine.
No they are not, you have to add the wiring to the harness yourself, or if your very lucky get a complete harness from a prelude (rare/much much more expensive). Any of your H22 swap questions can be found in my sig.