87-300,

let us presume you assemble your fd to tha air horn assy, attached the fuel lines and powered the fuel pump relay, when slightly depressing the sensor plate you would see fuel out your injectors but not at the plunger assy. Fuel at the plunger assy would not be metered and would be bad. I have seen fd leak when under snap accelleration fuel spray could be seen under the sensor plate. Only a small amount of fuel leakage is allowed. Good Luck

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Paul