Need Quick Fuel carb tuning assistance

duster360 said
I may leave the emulsion alone until I have done more testing.

This probably causing more headaches than you realize.

Discussion here:Holley/Demon Carb stumble

duster360 said
Also went from #76 to #78 jets in the rear to fatten up the WOT. Last test with the #76 ( stock jet) AFR went to 13:1 at 5000 rpm.

Fuel mix should be steady throughout the full load, wide open throttle. In other words, 3 (or 4th gear) pedal to the metal.

duster360 said
I am wondering since I am having to fatten up the carb, if I should have went to a 750 cfm. Power wise, I am right in that gray area (411 hp at 5700 rpm) where 650 cfm runs out and 750 cfm picks up.

Smaller carb will help fuel distribution. Larger carb has potential for higher top speed (more hp) at the 1/4 mile, and a fraction off the e.t. if fuel distribution is good.

duster360 said
Put the #70 jets back in ( surging went away) the primary’s and at 3000 rpm in high gear I am around 12.5 ratio. It did not like the #68 jet in the primary’s.
I also went from #76 to #78 jet in the rear and the AFR is now at 12.8 ish at 5000 rpm. Should I leave it there or rejet the PVCR and fatten it up more. More jet? Engine makes full power at 5700 rpm.

See above comments.
For now, it seems you must use 70 PMJs to drive on the highway regardless of what the WBO2 says.
For me, the easiest is to jet for steady conditions and jet for WOT in top gear (dyno and track).
If WOT at track wants richer jetting than interstate highway driving, then adjust PVCR.