Holley 80457-2 stumble

Set up for the inital run down the road I had 15 degrees inital timing, 34 total with vacuum at 21 inches.
Throttle response at a stop light was very poor for about 2 seconds, then responsive.
Running down a straight flat road between 40 and 60 mph the carb was surging very mild, I don't think a passenger would notice.

Now keep in mind this is not a hot rod but a stock truck that just is used for about a 1000 miles a year but my wife and 70 year old dad drives it once in a while.