I guess my 1971 Raleigh Super Course qualifies for this thread, among a few others. I've rebuilt this bike several times. This time, it has new bars and stem, new wheels, seatpost, and brand new 2x8 Claris drivetrain. Tires are Vittoria Voyager Hyper, 700x37. I put the original brakes back on so they could reach the smaller 700c wheels. I'm not going to keep the mustache bars, as there isn't enough room in there for my handlebar bag. I'll also put on a bell, rack, fenders, and dynamo-powered lights.
