ok i finally got back to tuning this 850 demon carb here is a list of what has been done since last post .
1. installed smaller IFR down to 28 from 35 in attempt to lean out transition circuit .
2. dropped main jet to 78 from 80 not sure that made any difference or not because i was trying to hit a home run and did two changes instead of one (i know BAD)
3. opened up the pvrc from 59 to 70
Started engine reset idle mixtures to get 7 to 8 inch of vacuum.
Test drove car while monitoring air fuel .
First of now the idle speed a/f has to be richend up to get the car to idle .
The idle a/f is at 13.0 to get the car to not go to lean when opening the throttle .
From 2500rpm down to 1500 rpm( deacell) the engine wants to lean out to 17 or 18% and car bucks alot more between idle and 2500 rpm cruise .
I think i over shot the IFR size to small and the transition is way to lean .
but i am now starting to see dry spark plugs and not wet blackened plugs so i am getting closer .

think i might do the following before opening the carb back up
1. decrease the idle air bleed some from 70 to 65
2. Raise float level to start mains sooner .
3. open up secondary mixtures scerws some more .
What is your thoughts on thus so far ?