Holley 4160 Carb (Vacuum Secondaries/Electric Choke/600cfm/"Smog Carb")
Note: Although this is a smog carb, there's nothing smog on my truck...
I've had my vacuum advance hooked up in the pictured spot for a while now, and my truck has always had an idle problem. I was at the drag strip yesterday, and a few people had their vacuum advance hooked up in the spot I have an arrow pointed at.
So which port should I have my vacuum advance hooked up to? The white circle/blue arrow one, or the red circle/white arrow one?