I had an issue trying to run LED bulbs even using a LED compatible flasher. They worked fine with the engine off but flashed erratically when it was running. I ended up replacing two bulbs with incandescent lights and it worked correctly.
Thanks for that information. I don't know why I didn't think to check earlier year handle parts. The repo '31 crank handles I got from the vendors only have holes for pins but I see the earlier crank handles are available. I like the idea of using an earlier style handle better than drilling mine.
The old broken crank handles that I removed had set screws. The car had blue vinyl upholstery - probably installed sometime in the late 50's/early 60's when the previous owner drove it in college.
I am restoring a 31 coupe. From everything I read and see from the vendors, the window crank handles should be held on with a pin. As you can see in the picture, my regulator shafts have splits and no holes for a pin. Any idea about what car/year they may have come from? The windows operate...