I have the chance to buy an 84 blazer really cheap. From the outside it looks rough, but under the hood the 2.8 has all kinds of goodies bolted to it. From what I could see it has headers, edelbrock torker II intake, holley 4 bbl. carb, msd ignition box (theres 2 of them, the big red one and also a smaller silver box) and a blaster coil. there's no telling whats been done to the internals, but would this seem powerful? and would it eat up gas really bad??