including what #43 and 46G said, I'm thinking this: Wire length will be OK, wiring on old vehicle is pretty easy. I assume you are getting a prewired fuse box. Headlight, tail lights, dome light, license light, horn, probably relay, headlight switch, heater sw, battery stuff, starter stuff, will be similar and you will ,for sure, have to have schematics and a minor understanding of wiring. Mark the old with tags, take the old harness out in one piece or near that, design/build the new to match with improvements while following wiring diagrams. Be sure to clean all ground points down to bare metal and have many, near front lights, near rear lights, near gas sender, at dash gauges/lamps, battery to eng, eng to body, body to frame. Last two are braided strap. Truck may have ballast resistor, car may not. That's all the info you get for a car.
