Join Date: Apr 2018
Location: Framingbury, MA
Using hacks to pass inspection isn't the most advisable route. Wiring is not something to try and MacGyver in an old car. Especially if you're planning on driving it for a few years before doing an engine swap. I watched my mint condition 1971 Bronco go up in flames on a busy road in Boston due to bad wiring by a PO years ago.
That being said rewiring the entire car is pretty involved. I did mine last year. The easiest way to do it I found was to blow out the interior (seats, steering wheel, column, heater box, etc.). I wired mine with an American Autowire harness and ran the wires close to stock locations with some modifications here and there. I am very pleased with the results. I got rid of the voltage regulator and have a 160 amp one wire alternator which can handle anything I decide to add. I also had an electric fuel pump at the time so I wired in a fuel pump relay for added piece of mind.
This year I added a Fitech fuel injection system which was an easy install since I already had an upgraded harness and the fuel pump relay in place. I think it literally only took me a couple of hours to get the carburetor off and the Fitech system installed, wired and fired. I also have wires ready for adding fog lights, AC, an electric fan and even power windows if I ever want them. You can remove wires from the harness for things you don't want but I left all the unused wiring intact just in case I want to upgrade anything else in the future (like the Vehicle Speed Sensor (VSS) wires). Any wires that I am currently not using (I don't even have a heater box in my car right let alone AC, that's next years project) I have capped off with wire nuts, heat shrink and the fuses pulled if applicable. I would suggest doing the same if you rewire your car before the engine swap with any unused wires.
1967 Coupe, 289, AOD with Hurst V-Matic II shifter, Vintage Venom front disc brakes, Unisteer power rack and pinion, Full AAW wiring harness, Fitech fuel injection with in tank Holley returnless fuel pump, 1" lowering springs front and rear, Northern aluminum 24" radiator with clutch fan, Mid-80's Mustang SVO seats with Mach 1 style TMI covers.