gmsracing

Upon acceleration I noticed billows of white smoke out the exhaust and very rough idling as if car wants to stall. Doesnt smell like antifreeze or oil. Its a strong smell of gas. I am reading that it could be blown head gasket, injector issue, faulty O2 sensor, etc.,. Didnt notice any antifreeze on oil cap and nothing looks different in coolant. Any ideas. Thanks.