Mel, I'm pleased I didn't disappoint you! You're right about the MTH model # and the silver trucks on the website. My engine came with black trucks; you can tell they've never been repainted. I also looked at photos of the prototype no. 1230 on Railroad Picture Archives.net; it was equipped with black trucks, but it could have started life with silver.
I have previously posted my MTH GP no. 1555, which was originally PS1 and probably about the same vintage as your 1563. Thanks to your inspiration, I've already prepared a video of 1555 for next Saturday. Sorry, you have to wait again!
John