I have my car pulled right apart (doing floors pans and the project snowballed). I'm doing what I can to hide all engine bay wiring so my LS1 swap looks even better. How else can I run the headlight wiring other than down the frame rail? I thought the drivers side fender support had a flanged hole like the passenger side and was going to run the wiring out there, then forward.
Looks like I might have to just keep it stock in order to not have to do any structural cutting/drilling to pass the wires through.

 

You could run it into the door jamb, the up into, or under the upper frame rail and forward. Just don't block any of the drainage holes. The cowl area dumps into the upper frame rail and drains out. If you block the drain you'll have a serious rust problem in short order.

 

I'll take a look at that possibility tomorrow. If I can't find a convenient way I'll just run it up along where the hood release cable goes.... Hopefully I finally have passenger floor in friday evening and all my engine bay and floor seams painted by sunday night. Then it's just 2 weeks of "vacation" to rebuild a T56, clean up some wiring, install the interior and get the front end all back together.