[351mustanger]

The best way to jet the idle circuit is by using your air/fuel screw. Run the pilot jet that keeps the screw between 1 and 2 turns out. I would guess the 38 is about right, but see where it puts the screw. Double check the float level again. The first picture is off and the last pic is when it is right. It is important to measure when the float tang just comes into contact (not compressing it) with the spring loaded pin on the fuel inlet needle. You can do this by tilting the carb until the float moves into the measuring position. Don't worry about the main jet until you have the ploat level, pilot jet, and air/fuel screw straightened out.