When it comes to the 84-85 hot air cars you are most likely gonna have your original sent out to get rebuilt or modified for bigger internals. You can also get an 86-87 turbo, but it will have to be modified to fit and unless your handy with a tig welder and know how to fab then that is another option. Your last option would be to post in the parts wanted and hope that someone has a used one they can part with. If im not mistaken someone was selling a turbo in the hot air section.