turbotypeR@SPEC

what all is involved wiring-wise in a swap from an ls to a gsr.the ls is a 96 model and the gsr engine is coming out of a older civic and it will not have a wiring harness.i already have a 96 gsr ecu.will it just be adding vtec wire and knock sensor or is there anything else?what about the intake manifold?is there anything different about the wiring of it?thanks.