I'M planning on swapping the Buick 350 in my Wagoneer for the 4cyl 4.5.L ISB engine. Most likely the "experienced" engine that I will get to put in will be set up for a 24v electrical system. My question is this, is the engine ECM available in a 12v version or will I have to get "creative" and somehow step the voltage back down to 12v for the rest of the vehicle?

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