Wow, that's a sweet tag! Pretty much in the same location I found mine. Label facing upward and affixed towards the top of the axle housing. I wasn't aware the tag I was removing was of any significance or I would have taken photos of it before I removed it. Neat to see others.
Jeff, I plan to have the restoration on my '66 hi-po started sometime this year as a t-bred. I plan to bring it out to be judged when it's done. So you will likely have a chance to see it in a few years when it's completed or if you happen to be at Perkins shop, he'll have it there doing drive train, body and paint.