I have a tiny little Carter 2bbl carb on my 318 and I think it needs some serious help. I had problems getting the car to start which resulted in new plug wires and coil. Once the engine was running it idles really slow and my idle mixture screw is in all the way so I can't bump up the idle that way. My idle mixture screws don't seem to be doing a thing. I screwed them in all the way and backed them out 2 turns and it didn't seem to do much to help, since then I've turned them out at least 2 more turns and backed them in probably about the same. I know the engine is running really rich because I can smell the gas in the garage after I run the car. At idle the engine sounds like it's running about a 272 comp cam type deal, but I'm pretty sure it's either stock or a mild cam. I think the guy I bought it off of might have adjusted the timing to get the cam sound just as a selling point but I don't have a light to check.
I don't want to spend alot on the 2 bbl because I'll be throwing a 600-625 4bbl on in the near future. I am thinking of pulling the carb off, tearing it down and washing it with a little lacquer thinner to clean it up, but I'm trying to hold off on that until a last resort. I know it should be my first resort, but I'm a little strapped for cash this month and the month is only 2 days old.