Brought Dart to shop to fix idling issue and car runs like s**t!

you can get that 284/484 down to about 700. Had one in a 340, strip dominator intake and a 650 Demon...and it idled just fine that low. idled even better with a Holley spread bore for some reason. crazy looking carb, great idle. Dont trust anything, double check everything, 18436572 CCW..not hard to confirm. Whats idle vacuum reading?