Stealthy in that it was a fairly flat aircraft, not too much to reflect radar from a horizontal incidence. Other than that, it was not "stealthy" in the current sense of the term: using radar absorbing materials, dissipated exhaust, angular panels that reflect radar signals away from the emitter, etc.
I also ended up helping to push an SR-71 into concrete pads at Castle AFB air museum (though apparently, that aircraft has moved on.) I was just a visitor, and helped with a bit of muscle when the museum guys seemed to having a hard time.
Unrelated note: Isn't this your Vulcan (bottom pic):
.: Castle Air Museum -- 5050 Santa Fe Drive, Atwater, California :.