I tried a dvd in a Win 10 laptop (Ninja Scroll 4:3 version) @ 1600x1200, this was full screen on the laptop with no borders.
Ninja Scroll
I then tried a different tack. I used a VCR as input and upscaled on a DVDO VP50 Pro and downscaled its output with the CYP. It's video is closer to the top but with a wider gap at the bottom
DVDO Star Wars
I also tried the same but upscaled with a Framemeister, the result was very similar to the DVDO
Framemeister Star Wars
The output of both looks a little on the dark side (sorry couldn't resist).
There are other options I could try but I'm getting the feeling I'm flogging a dead horse here.