I need to re-jet my WCFB carbs as the cruising air/fuel ratio is 10:1. I need to find a source for jets. I think I need 120-404 (0.104") and 120-389 (0.059") two of each number. My question is: name of source, and will the jets for the WCFB and the AFB interchange. The Carter jet drawing I have seems to say they will. Thanks in advance for any help--Ted von Kampen