So where do you hook up the vacuum gauge for idle mixture. Do you remove the vacuum line that goes to the distributor and hook it up there? Aren't you supposed to have the distributor hooked up when adjusting idle mixture. My truck is a 1959 with a stock 235 and auto-choke Rochestor. I have done the normal idle adjustment by turning the screw in till it stumbles and then turning it back out till maximum RPM is achieved. I just want to learn how to adjust the idle/distributor advance the " vacuum gauge " way. I do have a slight stumble when hit the gas from idle. Thanks for your time