Working on a new idea for a prop. A train based Ecto 1

We do a train layout each year for Halloween and I'm looking to do something different. I've got a board with 3 tracks and on one I'd like to build a stand alone car with a motor that houses an Ecto-1 model with working lights, protosound 3.0 with custom ghostbusters sound but be completely stand alone on the track.

Here is part of my theory.

I do have a model Ecto-1 but its a big sucker. I'm putting it next to my premiere diesel for comparison. Its about 14 inches long and a whopping 4.75 inches wide. The Deisel is about 3 inches longer but of course its only 2.5 inches wide and I'm not sure if the balance could be achieved even if you have the room around the track to do it.

But IF you did I would think you could break down a protosound 3.0 deisel, lose the top of course and rearrange the electronics and gut the bottom of the ecto 1 to make room. From there you could splice in to the light wire and reprogram the sound for the ghostbuster siren and add the lights to the ecto 1. The nice thing is that trains are so computerized now in theory you would be able to ruin the siren and lights remotely.

Sorry, protosound is the electronics for MTH trains and you can replace the sounds with others if you are experienced enough.