What kind of Idle are you running at stop signs?

My slant is bone stock but the PO did put on a Holley 390 4bbl. It took me a lot of tweaking over the past few year to get it to idle smoothly, but I finally got it all but perfect. 800 or so in park, 650-700 in drive. Part throttle acceleration was a big issue for a while until I got the float level set up correctly. Idle vacuum is 21.