My 2 cents: I had a stock C code 289 and debated on where I wanted to take my engine. I wanted more power but realized that my car would be a street cruiser and would live under 5000 RPM 99.99% of the time. Since I was rebuilding the engine anyway I decided a cam swap was in order so I settled on the Edelbrock Performer cam with stock heads. This led me to basically three intake choices, Edelbrock Performer, Weiand Action Plus or stock 289 4 BBL. I was leaning on the Weiand but I decided that I wanted my car to look stock, but have a little more oomph, so I went with a stock 66 4 BBL intake and Autolite 480 CFM 4 BBL Carb. While I was at it I completely stripped my engine compartment, painted it and replaced just about everything under the hood. I assembled the engine, put black crinkle finish finned valve covers and HiPo air cleaner, and dropped it in. I test drove it for the first time last weekend and I absolutely love it! It pulls strong and since I will be operating mostly below 5k RPM, I am very happy with my choices. I must admit, it was really hard to restrain myself from putting on AFR 165 CFM heads, Weiand Stealth Intake and hotter cam, but I had to be realistic in how I would use the car and stay on theme. So my advice is to be honest with yourself on how you will use the car and stick with a plan. Like Cobain03 said, it gets old and expensive swapping things out over and over again.