Main jet tuning... ...in France

Put the 6.5 back in it, and figure out your main jetting. Concentrate on ONE thing at a time. You go changing a bunch of things at once it has the potential to create confusion.

The number on the PV is the approximate vacuum reading that it will open. It has nothing to do with the amount of fuel provided.

Cruise A/F is controlled by the IFR/IAB at low rpm and the main jet at higher rpm. Find out the point where the transition occurs from IFR to main jet. You should see a change in A/F when that transition occurs. Otherwise you may be working on the wrong.

The PV is a load/WOT enrichment circuit. Have a Vacuum gauge and A/F hooked up. Get the car on cruise going up a slight grade and feed it throttle. Watch the A/F and vacuum gauge. The A/F number should go leaner as the vacuum gauge drops in value. You want to find a tipping point where the PV opens. If the engine gets to the 15-16's as you are loading it, the PV likely needs to be a higher number. If A/F stays low, the later the PV should open.