I was looking at 50resto.com and they have the typhoon intake manifold kit (upper and lower) for around $330.00. My question is, is it worth it to only change the manifold without doing the heads? I can afford the manifold at this time but buying a set of heads right now is not going to happen. So would it be benificial for me to only do the intake swap? And what kind of power increase could I expect? Any help is appreciated.