every thing so far what you said makes sense .
the only thing is the main jets seam OK car is cruising around mostly at 13.5%a/f up to 2000 from 2000 up to 3000 it is now going a touch lean .
i think the IFR is slightly to small because i have to open the mixture screws more now than before and that is what i have to do to keep her out of the 15%a/f danger zone at-very light cruise .
the box stock idle bleeds are 70 i helped the situation by putting the 65s in today seems better than 70's on the idle bleed .
Here's the thing the power valve is a 5.0 but i can not open the valve when cruising on the transition circuit of the carb because the cruise vacuum is so high 18 inches at 2800 rpm have to almost floor it to get it down to 5.0 inches to see the power valve open .
Can i try a 10.0 it seems that would be easy to get to with out flooring the throttle and then maybe i could go to a 76 main jet ? will the pv open at idle say 900 rpm? if idle vacuum is only 7 or 8 inches?