has anyone used an aftermarket harness? i found one that is a standalone harness but i dont know if it'll work for me. converting my tbi to tpi and it has most of the sensor connections i need. i noticed though that it doesnt connect into the firewall like the original. does that mean my fuse block wont be functional er wat? is there a way to run this harness and still use the original fuse block for everything else? need info any help would be greatly appreciated