[aray327]

i would second that idea. If you have a bundle of wires and don't know if they are all in use, it may be a good idea to start clean. that way you know what everything is and where it goes.

however if money is an issue, and it usually is, then take each wire one by one and follow it from the fuse block to where it goes. that way you can get rid of the wires you don't need and make a diagram of your fuse block indicating the wires you do need.

I went through my fuse block when i did my ls swap. I was able to pull out unneeded wires from the block and route the new ls wires right through the original block through the firewall. Looks original and clean.

good luck