I have a 1987 camaro and i have been driving it alot this day.. by the end of the day the car started steaming. i looked in the engine and i coulndnt find where the leak was coming from. but the radiator was dry. What could be the problem??

Could be that your coolant was low to begin with. Check the oil in the engine, if it looks milky you might have cracked something. If the oil is not milky, fill up the radiator and try it again.

Check for leaks as well as pressure test entire system and cap.

Head gasket, block, heater core...I would put in a can of stop leak. It might hold you over until you trade or rebuild it.