I am looking for some info on if/when to adjust the IAC settings for my SBC 350. I have a Holley TBI unit where with the larger size figured a change would be appropriate from the stock settings? Part of my reasoning behind this is when I take my foot off the throttle when coming up to a stop the engine takes it's time getting back down to idle. I think part of the problem is I don't seem to be entering DFCO for some reason so probably some tweaking there needed as well. I recently completed a 7747 to 8625 w/$OD mask swap and am still working out the bugs. Thanks for the input!