Where can I get parts for a Carter WGD carburetor, like metering rods and low speed jet tubes? Are they shared with any 4-barrels of the period, like WCFB? I have a WGD carb on a 1955 Pontiac 287. I changed from a Hydramatic to a 3-speed manual trans. The carb seems to have a little flat spot off idle, that I think may be related to different loading with a clutch vs a fluid coupling. I'm looking to begin by setting this carb up to match the factory manual-transmission spec.