yea, i've got a downey cam and a rebuilt carb, so it's probably different.  with 3.5 turns out, and the idle screw all the way out (lowest idle), it idles around 1200 rpm.  at 2.5 turns out it'd be probably like 1600.  i've got it at 4 turns out and it seems to be running good, idling at just below 1000.