So i dont know to much about anything when it comes to wiring swaps.I happen to come across a cheap ls long block,Its a 91 so its obd-0 .What do i have to do as far as wiring when droping into a 90 civic hatch.i have no idea what the model is..It has crank windows no sunroof and had drums in the back so im guessing its a econo version which is dx??? lx???? which means its obd-0? which means i can use the d15's fuse's and main relays??