318 +.030 Dieseling

Thanks for the quick reply and sorry for the lack of info.
Idle is 800-850 in gear and just over 1000 at idle.
Idle mix and speed were done with vac gauge method. Ended up 1 1/8 turns out at max vac. Cam gives it a lope but it idles fairly smooth considering.
Engine runs at 185* when fully warmed.
And yes, I am talking about Run-on after the key is turned off.