title says it all, here's my readings: 478 ppm HC & 6.03% CO I'm allowed 400 ppm HC & 4.00% CO I need toi know what I need to adjust on the carb. I know the ignition is fine. I have a new distributor with good plugs and wires. I gutted the computer controls, and I have an Edelbrock 1406 carb on a 305ci motor. I was thinking I needed to jet the carb down a bit. When I went through today I had my idle way up there, and when I got home I idled it down and played with the idle mixture some. Anyone have any advice? I just have to pass, I could care less if I pass well or not.. -BuSH I'm a dislectic agnostic. I believe in a higher being, his name is DOG.