I don't have much more to add than: a) seatbelts are an easy add, and b) there's no way you have a fiberglass frame.

Fiberglass parts, maybe, but the frame is is from a Camaro, and it will be all steel.

Photos will tell a lot. Grab a digital camera and post 'em up. Oh, and don't give the car away until you get some more info. Someone WILL steal it again if you give them the chance.