I have a stock 56 chev. 283 eng. with a 17059206 quad on it, and I have drilled and plugged the bottom plugs with the epoxy that is recommended on this site, but the plugs still leak, so I must have screwed it up. I would like to get a carb built by Cliff but I cannot wait a year. Are there any other good options out there? All I want is a good quad that gets me the best mileage I can get on my daily driver. I can overhaul myself if necessary, but I don't want to screw up bottom plugs again. Any options, or what quad should I look for at the wrecking yard or wherever? Thanks.