Actually 72-74 all had the huge tits. some of the early 72's received 70 and 71 bumpers without the tits. Over the many years a lot of folks have replaced their 2-4 bumpers with earlier styled bumpers. It's not just barracuda's and challengers either. B bodies got these hideous things. At least chargers did. The wing was not available 2-4. And the barracuda emblem is on the wrong side (I believe and will confirm) of the rear panel on both those. And the aar stripe was not available in those years either. The front bumper on the purple one is the earlier style bumper also. It's quite difficult to decipher the difference's between 2-4's. There are a few subtle difference's but without detailed pictures it's hard to tell the difference's.