Allstate Carburetor is providing the tuning information about Edelbrock carburetors since Edelbrock started making them. ACFI is happy to provide the specs many of you have asked for all compiled into 1 place. All of the parts listed below are available on our website. To locate and identify your Edelbrock carburetor the number is located stamped into the front lower left hand corner of the carb where the mounting stud is. All of these parts are available on our website as well as more Edelbrock carburetor tuning parts. Carb numbers

1404 500cfm

Metering Rods 65x52, Primary main jets .086, Secondary main jets .095, Orange power piston step up spring

1405 600cfm

Metering Rods 70x47, Primary main jets .100 or .101, Secondary main jets .095, Orange power piston step up spring

1406 600cfm

Metering Rods 75x47, Primary main jets .098, Secondary main jets .095, YELLOW power piston step up spring

1407 750cfm

Metering Rods 71x47, Primary main jets .113, Secondary main jets .107, Orange power piston step up spring

1409 600cfm

Metering Rods 68x47, Primary main jets .098, Secondary main jets .101, Orange power piston step up spring

1410 750cfm

Metering Rods 71x47, Primary main jets .113, Secondary main jets .107, Orange power piston step up spring

1411 750cfm

Metering Rods 75x47, Primary main jets .110, Secondary main jets .107, Orange power piston step up spring

1412 800cfm

Metering Rods 71x47, Primary main jets .113, Secondary main jets .101, Orange power piston step up spring

1413 800cfm

Metering Rods 71x47, Primary main jets .113, Secondary main jets .101, Orange power piston step up spring.