After some research I decided to purchase a new Solex-type carburetor on eBay. Cost me $128 from a seller located in Arkansas, they're all inspected and tested before shipping. I was planning to rebuild the Carter YF (and I probably still will) but with rebuild kits in the $50 range and never having rebuilt a carburetor I figured I'd try one of these first. My engine runs a lot better with the Pertronix ignition, but it still misfires and backfires quite a bit in addition to the leaking. It also seems to run really rich with some really intense fumes and sometimes white smoke if I try to hammer down on it. I know some people prefer the Carter for various reasons, but I'm sure I'll be happy either way as long as it runs better. Any opinions?