Hi Larry;
I have been looking for an finally found a booklet I got off eBay called, "Bob Hoover....The Pilot's Pilot....The Man and His Airplanes." It's only 24 pages long, but has many photos of all the different types that he had flown in addition to his air show mounts. On the back cover is a sequence of shots and one is from behind and slightly from the left side. It is a bit cropped, but the only thing I can see on the wings is the black wing walk. There is another shot in the book, taken in flight, from the left side and above that shows a good portion of the wing, and there is nothing visible on either wing, such s emblems or "N" numbers. If I can figger out how to use my scanner again, I'll try to send you scans. A quick check of his book "Forever Flying" shows one shot from underneath that shows no markings. It was taken from the left side during one of his "Tennessee Waltz" one wheel landings and gives a good view. So if you got good shots from both sides, that should be all you need, and with nothing on either side of the wings, no need for photos in the photo packs! Nothing to show! The black wing walk looks to be about 12 to 16 inches wide, and goes from the flap hinge line and stops about 12 or 16 inches from the leading edge. Hope this helps.
Dan McEntee