[Bruce Edwards]

Yes you need to get the pressure done to 5 or 6 at the carb. As for a good temp?? if the mix is right it will find it own best. Every engine will be different the trick is not melting the top of the piston. A cast iron head will run hotter than a aluminum one so for me temp is not that much of a factor.
The idle bleeds should not see any effect from a jet change. The idle is not dependent on the jet size. The idle system gets it fuel mix from bleed holes in the air horn and the slots at the bottom of the bore just in front of the plates. Your idle screws change the air to fuel mix between these two areas and the way to see big changes here is to change the bleed jet size and as all but race carbs are not set up for this type of thing you have nothing to worry about.
If you want to know what I am talking about take off the air cleaner and look down the throat of the carb. See those little holes made out of brass on the sides? Should see two on each bore one small and one larger.