I know we have some mechanics here so I thought id ask; How do you know what carburetor to put on a motor? Ive been looking up some for my '73 Scout with 258 I-6, It has the complete Clifford 6=8 setup. Right now I have a Holley 470 truck avenger, I got it because it was suppose to be the "next best thing" to EFI. It said it was designed for 4 & 6 cyl. motors, but I have it tuned as low as I can, its still running rich, and my secondarys dont open... Ive read all sorts of carbs are used Holley 2-bbls, Webers, Motorcraft 2100, and theres conflict about the 470 I have, some people love them, but most say that "too much" and not necessary to have a 4-bbl... From what Ive read I need a carb with 300-390 CFM?