Yes. I did not recall 747s having the winglets but I didn't know (until I looked it up) that they were a later addition to the -400 version, as you say.
Yup, and I used to know the guy who made the engine inlets, in one piece, on a big multi-ton stretch press. Sounds easy, but it is a bit of an art not to stretch them too thin in any area. I had not thought of Kip for many years, until we were visiting NASA in Houston a few weeks ago. There, I could reach out and touch Kip's handiwork on one of two 747s that were used to transport the space shuttles. It had a shuttle mock-up mounted on it.
A friend of Doc's, one of only two B-29 bombers still flying.