Yep, like Chevy Lee says, roll them up for later. Most everything is run through the C100 and PCM but depending on you're relays and fuses the wires can be cut before and after the factory fuse box. I eliminated the factory A/C relay and pcm fuses and added an external fuse box with A/C, electric fans and pcm fuses just because I made a plug and play mini harness to plug into the factory LS1 harness. With Nelsons harness it should be a breeze I still want one to play with.