Philip, I have no idea where the engine came from. I think it is a flatcar load in HO. They were sold in pairs and I still have one left. If you want it PM me with an address and I will send it to you.
Craig, Here are a couple of closer photos. This is where it will sit on the layout near the machine shop. I am placing details around and when I am happy with everything I'll set it in.
Roland I can only echo what the others have already said. Great looking scene and knowing your eye for detail I'm sure it will look incredible when your finished. Nice addition to the Shop area.