My 1967 Alfa Romeo GT Junior has left-handed threads for the left wheel nuts, and right-handed threads on the right side. I'm used to that, as I've had other (domestic) cars which were manufactured that way. But this Alfa is the first car I've owned with the left-side front spindle threads and nut also left-handed. My repair manuals said nothing about it, and as I've learned from working on cars my whole life, when what you're doing isn't working, try something else! Somehow I had the idea to try to loosen it by turning it to the right, and it worked.