92 foxbody Dash wiring

I have a 351w swap, it was a drag car and I am wanting to turn it back to a street car, so I'm needing the headlights, brake light, horn and all that to work, but it was stripped of all wiring.. So I don't need the motor harness cause I installed the 351 carb engine, so do I just need the fuse box and wiring for the headlights and accessories or will I have to have the computer ad well? I thought the computer was to work the fuel injection engine, do I need it for all accessories to work as well?

I have everything I need to spark the engine and keep it running, so what all do I need to run headlights and the accessories

So I need the fuse box as well? Is that how the harness gets it power