The OP's car is said to be a '64 Barracuda, but, I'm guessing you were referring to Jeff's 67. If so, he stated that his has ported J heads on it. My impression is that the OP has access to a '67 273 BBL intake and was considering using it with later heads than what his '64 has. If I'm mistaken, I hope he will correct me and supply some further information.