Another timing curve question

Carb is driving me nuts, although I did manage to do some tuning.
I opened up the mixture screws to 1-3/4 turns each, juggled the primary and secondary idle speed screws, and finally found a combination of settings that would idle around 13:1 on the wideband and minimize the lean spike when just barely touching the gas. It still likes 1150-1200 with the fans off, since it drops close to 100 rpm when the fans kick in and 1000 is right on the edge of spiraling in and dying... I also discovered that the primary accelerator pump linkage was too loose, and taking the slack up further improved the response.

Then the wideband decided to foul again while disconnecting everything for a test run. So I put it in the garage and installed the 8.5 PV. Will play with it again tomorrow. I need to get under there and pull & clean the O2 sensor, I suppose.

Incidentally the PVCR's are right around .064 and I was surprised to find that the primary jets are only 70's. Makes for a nice lean cruise at 14.5-15.5:1... Will see how it drives with the 8.5 PV (cruise vac = 15) when I get some more good weather. Should I expect to enlarge or reduce the PVCRs with this jetting? A #70 is .073. I remember reading that the PVCR should be half the diameter of the mains (for 25% of the flow), which means it's way too big (.073/2=.0365)...