hello, can I only put a body that is made for the firestorm on the firestorm, or could I put like a jeep body, or hummer body etc?

Thanks in advance!!!
HPI Porsche

You have to go and try at your local hobby shop and see if you like the looks of the bodies b/c none of the bodys you asked about are made for the firestorm but will fit if you buy longer body posts and maybe some minor trimming.