Thanks for sharing this information. It really opened up my eyes. I apologize to everybody for me acting like a know it all, do I have lots to learn. Which year factory intake manifold and carburetor would be a good choice for a 318? Are there any good flowing exhaust manifolds that I could use. If I can't find a factory intake manifold, which aftermarket would be best to use? I think that I found a set of 360 heads, would they be a good choice for budget heads? I promise I won't come back as a know it all. I'm just wanting a fun car without spending a fortune, if I can run factory manifolds instead of headers and still get decent performance that would be great. What would be a cam similar to a 340? Again, sorry everyone that I was such a jerk.