Better to get a premade wiring harness or get ur old one cut down for swap?

[Sparks67]

Originally Posted by IndyNova

That would be your call, I know I don't want all that wiring to be seen in the eng bay. My only issue is that with the size of the connectors, making a hole in he firewall that will fit the connectors and not look like poo. I don't think that there is really any advantage one way or the other as far as buying one or having one re-worked. Just my .02, but I'm still a noob at the ls swaps

You have to do cannon connectors, that is best to put it through the firewall.
If you look at Camaro XV, Mark has it by the battery tray.