I'm transplanting an LS1/t56 into my Westfield (Lotus 7 Clone) autocross car. I need some advice on what all I can get rid of in the wiring harness. This is not a street car, autcross only with 35 to 60 second runs. I want it to be as simple as possible.
more to removing circuits than cutting plugs, remove the pins at the PCM connector..if your not using the LS1 alternator that circuit could be deleted also, as well as AIR system circuits
__________________
Quote:
"Life's tough......It's even tougher if you're stupid."
-John Wayne
I found it best to just lay it out on the engine, connect all of the equipment that you want and/or removed what you don't want. Unwrap the harness and just remove anything that is no longer connected or needed. This will also allow you to route the harness where you want it to be.
It is easy to remove the connector and wire all the way to the PCM connector (Red/Blue), just open it up and pust the wire/pin out.
The usual stuff:
Both Rear O2's
EGR (if you have it)
AIR system
A/C (clutch and pressure sensor)
EVAP (Valve/Solenoid)
If you go SD tune, then the MAF
What can I get rid of? 
