I see the back half of the frame/suspepsion is different. You mentioned the singlejacks were throwing chains, maybe they stiffened it up to prevent that. I noticed the R750 and the hotshot have a flat steel section to the frame.
Im wondering what my chances are of finding an old snow machine with a jlo single.
My twister is running great. I need to replace the rubber motor mounts, it's going to require cutting the frame.