I have had 80's ballys, wpc and sega in my Soul. all fit but you may have to pull the passenger seat forward a notch. The wpc and the sega needed to have the head removed. Put it in first to the side and then the body by the side. The WPC and Sterns may fit with the backbox folded but I haven't tried it yet. I had a speakeasy in with just the head folded.
Great little car. Funky pin mover and 50 mpg.