Wouldn't the #8 spacer be longer than the dimension you described Mike? It looks more like it's just under 2" long. Are we talking about the same part?
The #8 wheel bearing spacer is what the question is about. I believe I have a bunch of the -52s and am curious about the difference in length between the 52 and the 63. I am not with my parts right now so I can't take a measurement but I think the spacer was a hair under 4 inches. Mayby like 3 & 7/8ths?