Hey guys, I've never messed with a carb before as I am a modular guy (01 GT). My father's 66 fastback has a holley 600 with an electric choke that was installed before we got it. When the engine is cold it idles soo high. The tach doesn't work in the car yet so I'm not sure but it has to be over 2k easy while its idling cold. Now the idle screw is adjusted just perfect so it doesn't die, but it low enough for a good choppy idle. I don't want to adjust that. There is a way to adjust the "high idle", correct? I'm looking around for a holley 600 diagram but not coming up with anything. My dad was talking to a guy that said the adjustment screw was underneath the holley and so the carb would have to be taken off. Is that accurate? Anybody have a pic perhaps?