Thanks guys! The crane site is great. It explains a ton of stuff. My problem is what is a rough idle? I'd like to get some HP and the engine is 11.0 to 1 compression stock. So I'm not sure how to proceed. It will be a weekend driver only, mild performance build, not too tame, with enough get up and go to feel like a hot rod, versus my toyota truck. Pretty confusing to figure it all out.I've been told the 1968-71 429's put out around 350 hp. I can't find any site to confirm this, and have heard huge variations in actual HP. I would like a smooth idle engine with umph to move when needed, but will never be racing it!