To adjust the metering rods, follow Figure two:
After setting the meterin rods you should go back and adjust your curb idle mixture. The way I do it is to turn the screws all the way in (clockwise) until they seat likghtly. Don't tighten them down or you will damage the mixture screw tips. Back the scrtews out 2 1/2 turns on each screw. Start the car and let it warm up.
With the engine idling and warm, set the idle RPM to the proper RPM (usually 750 in neutral/park) and check your base timing (make sure to disconnect and plug the vacuum advance hose). Once your RPM and timing are correct start turning each mixture scre clockwise 1/4 turn at a time until the motor starts to run rough. Then back the screws out 1/2 turn each. Now go back and double check your timing and idle speed. Repeat as necessary.