Does anyone make these harnesses? Can I make it myself?
I'm currently thinking about swapping my 350 tpi for a ls2 from a gto.
Is it a good idea?
The only thing I'm worrying about is the wiring! Can some one clear this up? Thank you

 

Save yourself a headache and let the professionals over at Speartech make it for you. All you would have to do is plug it in. I think their reworks might be on hold due to high volume of stand alone harness's though. Not sure if you have the old harness or not.

 

By any chance did you read the LS1 sticky in the top section of this forum?

Yes, it says "LS1", but it applies to the other LS variants.

If you had read the sticky, you would have seen this link:
https://www.thirdgen.org/forums/ltx-...p-3rd-gen.html

 

What I am doing is simple, everything from the firewall forward is going to be 4th gen wiring - meaning pcm in the 4th gen stock location and fuse boxes. Everything firewall back is third gen just with a little beefed up wiring. Then again I like playing with wires. Pocket's thread is really invaluable to do the swap. After reading his threads I was able to make myself a diagram for the wiring and sort out what I want/don't need.

 

I have done that very same swap. I used a J1 harness from Speartech, and that´s about everything you will need to get the LS2 running. Send you computer to someone who can delete some codes that you won't need, and turn off the VATS. The car will be a million times more fun.