Trying to dial in my QFT 750

I've been reading articles, I've got a wideband A/F gauge and been reading my plugs. Im stumped honestly as to which way to go with my carb at this point. Im trying to get maximum efficiency and everything I've been reading says I should be in the 14's idling and cruising, WOT I should be around 11.7. Im running 91, non oxy gas.

Engine specs and carb set up.

LA 360, Magnum heads, XE268H cam, Air Gap, QFT Slayer 750, TTI's, 727 with 2800 stall, 3.73 gears, 15in vacuum.

The QFT has 72 mains, 74 IAB, 6.5 PV

The A/F gauge says its running rich at idle when warming up its 11.3-12.5, It is rough idling on initial start up, for the first couple minutes and the gauge occasionally will hit 10.2. When warmed up at idle its 12.7-13.5. In gear 12.9-13.8.

Light cruise around town 45mph or less it is around 13.1-14.5

While cruising down the road at 60 and 3000 rpm its 10.8 to 12.7.

WOT 10.0

If I let the car sit and it cools down a little, and I start it back up. It idles very rough, the A/F gauge is all over the spectrum, from rich in the 11's to very lean in the 17's. I have to feather it, and rev it a few times to clear it out only after a couple minutes does it idle smooth.

I've increased the IAB's from 70's to the 74's per QFT's recommendation because it was carbon fouling the plugs, earlier this spring.

I've tried setting the idle mixture screws for highest vacuum reading, but that throws the A/F guage into a rich condition. To get the A/F as close to 14 as possible Im actually dropping the vacuum reading usually about 1 to 1.5 points. I've checked for vacuum leaks and have none, I've disconnected my PCV and that makes no difference.

I have not done the WOT shut down to check the plugs, but just a overall. I figure they should be that nice golden brown/tan color all the time. I've put about 150 miles on the plugs. The ceramic is bright white almost like new and the electrode is grey, all the plugs look exactly the same. Im running Champion RC12LC4, stock plugs for magnum heads. This says lean condition all the way, but the gauge is saying otherwise. Im confused!!!!

View attachment IMG_20150621_171210604.jpg

Oh and the marks on the ceramic is anti-seize.

I would appreciate any help as to what to do.