Re-wiring for another motor - help please

Hey guys. I have a 1993 isuzu. i have currently cut off the front end and removed the motor and transmission. Heres my problem. I have a shit ton of wiring. Last night I removed my dash and all the ac and heat shit so thats out of the way. I need to know what can unhook or be cut that I dont need from the wiring harness.

I have a 84 300zx turbo motor going in it and I need to know what I can get rid of on the harness and/or if certain parts unhook. All I really want to keep are the basic essentials like the dome light, headlights/taillights, and ignition/maybe radio. I am not running any AC or crap so al lthat can go.

Can someone please give me insight on how I know on an isuzu what to unhook and/or if the units such as headlights and so forth unhook to themselves somewhere and how to run off the ignition to start up the new motor once installed?

Thanks guys!

sorry but... bump... need some of these things answered if i can get a little help...

well man looks like you're in for it, I had to re-wire my entire truck when I put the 350 in it, best thing I can tell you is get a wiring diagram book for the 300zx and go to town, most of it should be the same, some will have to be changed, good luck, cause it aint fun.....