Quick ZC Wiring Question.

i have an 88 hatch Dx i have a ZC that i am puting in next weekend, i can get the si wiring harness, manifold and ecu for cheap, my question is- can i use the si harness, or should i re-wire my dx harness, for the install? i am thinking that i could just plug the si harness into the motor and ecu, and i won't have to cut up my harness... or am i wrong?

modifying your DX harness is a better solution and that's what i suggest and have done in the past.