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Thanks for the input. I went down to the emissions testing center and asked them first hand, this is what they told me. There are two ways to approach it, first I can "replace" my engine with a '75 engine. In this case if an engine is "replaced" it must meet the standards of the newer part, ie...

Hey everyone I'm brand new to the Bronco world, I just bought a '71 with a '75 302 builder. The problem is the engine is from CA, so it has all the smog equipment on it. Does anyone know anything about the smog system Ford used? I live in Colorado and I don't need the smog stuff to license it...