Someone else can chime in, but I think with the 74 at least, if you do the swap, you use the 72's injectors and you should pass. Adrian (beam514) has done the 74 swap out in California, the land of super strict emission testing and has no issues. I'm not sure about the 75, but both Matt (M-Rod) and Dion (deeznutz) have done the 75 and can tell you more about how that goes. Hope this helps some.
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