I have a stock 2004 extended cab colorado. The car currently has stock 5 cyl motor and a stock transmission. I want to do the 7 or 7s SCORE off road class and that can use up to a V6. I was really just wondering if anyone had done this engine swap or knows if it would even work. I mean would the transmissions match up? I've never done an engine swap so I'm in the dark here. any and all info would help immensely. Thanks