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    Transmission and carburetor swap

    I have a 90’ 5.7 tbi with a 4l60e, I’m about to start my project of putting a new engine in it with carburetor on it and swapping to an hm290 5- speed transmission. I was wondering if I would need a different ECM and some kind custom wiring harness since I will no longer have tbi or an automatic...
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