What kind of Idle are you running at stop signs?

71 valiant with stock 1920 holley. 650ish in gear. I set the hot idle in neutral with the head lights on to 750ish. pulls a steady 17 at idle on the Ole vac Guage. I can't get the mix screw to kill it at idle by going over rich, but I can by leaning. Tried another metering block and screw. But I get it set to wwhere it smooths out and the car idles nice.

what really cleaned it all up was buying NOS made in USA cap and rotors and getting rid of the Chinese junk. Bam. Smoother idle.

second bam. Jet up two on the main jet with an hei ignition. Car has way more oomph when you mat it. Extended tip ngk plugs are a nice light tan.