HELP PLEASEEE!!

i just baught a 96 mustang only to find out the car was overheating_replaced the radiator ; head gasket && head_car doesn't overheat anymore so far but smells like burning oil. i think the other head gasket is bad also, baught a new head gasket and planning on replacing it - dual exhaust ;; __ on the driver side still blowing out smoke on the passanger side its clear ;; spitting out water occasionally? now when i turn on the car and its running && i turn on the heater _ the car dies out - replaced the battary - still dies when heat is turned on anybody got any suggestions?

thankss!