after doing a few highway pulls with my buddy a couple nights ago i pulled upto an off ramp stoplight and saw steam from my engine bay. quickly pulled over and saw there was coolant everywhere. my temp gauge was still a little lower then half and there was gurgling noise from my upper rad hose usually indicating air in the system. now its misfiring pretty bad and puffin white smoke. anything at all it could be accept the obvious and probable head gasket?