Yes, I own one. At least, that's what it came with when I bought the car in 1980. 8/17/65 build date '66 Barracuda had the 315 casting heads on it. It could have been changed, but, being a Hawaii car, I doubt there was much in the way of parts to be swapping around back then. It's a 4bbl car and still had the B273 block with appropriate date codes and HP pistons.