21rev_z28

I just bought a 99 z28 m6 roller. I'm slowly going to build it and right now trying to figure out wiring. All the wriring is there except I think there must be a harness that comes from the dash into the computer (computer and engine harness missing) if anyone could help with this id apprrciate it. Also if there is any pics out there where would I find them? I am a lsx noob lol! Thanks alot