Nice. I am driving a 65 Newport until I finish my Dart. The C-bodies look heavier than they are, ~4000 lb, lighter than our minivan.
You can actually get LH thread lug nuts. I got them for my Dart, though 7/16"D instead of the 1/2"D you need. A guy specializes in them on ebay. But might be better swapping to RH for the long term, so tire shops don't spin your studs trying to them off. Even after making the desk kid write in big letters "LH THREADS" on the shop order, a Goodyear monkey spun one on my 69 Dart and didn't tell me. I found out later when trying to remove the tire on the side of the road.
If yours is like my 65, the studs are swaged to secure the front drums. There is a special tool to cut the swage, or you could cut them flush and drill out (pain). BTW, many cars used LH threads, especially foreign. It wasn't just Chrysler following a strange theory about loosening nuts.