I have a 65 mustang fastback and there is this crazy bolt sticking out of the bottom of the car on the left side. I cant figure our what it could possible be for. Is it stock? The other side of the car does not have a bolt sticking out here. Its not inline with the leaf strings so i don't think its for under-rider traction bars. Its too far forward to be the drain for the fastback vents. Im about to chop it off with the angle grinder and grind it smooth. What is this thing?