[NorthernThrux]

Looking at this for my '73 as well. I keep forgetting to turn off my lights because I'm so used to them going on and off with the ignition, as they have in every car I have owned for the past 36 years. Even though DRLs only became law in 1988 or so in Canada, I had a motorcycles and then a 1980 Saab turbo and it's lights came on and off with the ignition because that was already the law in Scandinavia. I had a series of Saabs until 2005 and then Audis and Porsches, so the habit of turning lights on and off was never developed in my muscle memory.

Ideally one wants a circuit that is interrupted when the starter motor operates so that you get the full current to the starter and not the accessories. Not entirely sure what gets interrupted on my car. Right now I have the lead to the fog light switch coming from the low beam fuse and then heading to the fog light relay, which is US compliant as the fog light relay goes off when the high beams are switched on.

I have John Audette's LED headlights (also a set of his H4s in storage for "correct") and reproduction Hella 118 fogs from Auto Foreign Services which would make good DRLs. Probably best in conjunction with the marker lights.