Good reply here, Joe. It's all about compression ratio. It's important to get it right before you look for a cam...and know what it actually is, not what you estimate it just might be. To add a little to Techinspector, as important as the static c/r is, there is also dynamic c/r....that's the actual c/r the engine is seeing while it's running. You could theoretically have a static c/r of let's say 9/1, so you figure you're OK with pump gas...but lets say the cam you choose has a very early intake closing point...traps a lot of charge, and makes a lot of power....Well, it might also make the engine detonate like crazy, and of course that's very bad. So all this stuff requires a lot of research. It's best to talk with a good cam company that will take all the info on what you're trying to do, and build or suggest a cam that will work for you. As mentioned earlier in another post, I prefer to go with the smaller, maybe lesser known company's, mainly because I like to talk with the guys who actually grind the cam, and maybe even design it themselves. Most all the people on the cam tech lines at the big companys are just reading off a screen, and suggesting from a set list, with no real experience in anything else. Unless you're a distributor or some higher up, you wont be able to speak with a real hands on person. Im not saying that Crane is like that, I personally have no experience with them. I know I have not had luck at all with Comp Cams, and that's the first one most people think about, cause their name is all over and they're so big. Try Crane, Isky, Howards, Crower, etc. John