No, just the opposite. I thought that I had identified them with the photo titles. The smaller adapters are the ones that fit my '41 perfectly and I would assume would fit your '46.
Perhaps the "L" one and the mate "R" would fit the later trucks. The L&R stamped ones are the ones that have the funky clip on the mounting bracket and the shorter distance between the bracket face and the outlet.
I just took a look at the album and all of the pix from the link to the end (clicking the right arrow) are the correct adapters. I would be more than happy to sell you the L&R marked ones for what I paid for them.
Don
Don
