I do suspect the whipple with the front pie opening may be pushing fuel to the fuel to front and not the back especially with 3" runner.
Hoping the Tunellcram helps.
I really need to dyno with 10 o2s to see fuel distribution.
I can tailor timing accordingly per cylinder and if I ever go port then even more so..

How much boost were you running this past summer?

Just go to port injection now. Ive been down this road. Mercury runs 7.9:1 comp ratio w 12lbs boost on a mercury 1075 with 93octane and they all live. Also they run there AFR's on the crispy side at 12-12.5 WOT 6000rpm

Damn dude! Sad stuff there.

10psi

I`d love to see their timing and fuel table! Must be a secret thou, can`t find any info on that at all.
Personally those boost numbers are kinda dumb. $hitty flowing head with 10 psi is`nt any worse than a good flowing head at 8psi.

I'd have to try and video my computer screen while its running.I can say,I saw 31° of timing at 12lbs of boost and it wasn't super rich at all.

The million dollar question that I have YET to ever hear a legit answer to is what AFR can a "average " BBC boosted motor be tuned to and have no detonation, Im talking typical 4.25 stroke/8.6 to 8.8-1 base, 8 to 10 lbs of boost, typpical cam in the 245/255 give or take range with efi. I have asked multiple fellow engine builders/tuners. And Im NOT talking tailpipe afrs. I know what tailpipe afrs I tune to and I know what cylinder afrs I have seen with my data aquizition but even my plexus knock sensor on my dyno wont tell me that "# 5 is detonating vs a different one , I would maybe see # 5 is LEANEST, . Have only tuned a few holleys so havent gotten to fully explore IF we could get those leanest cylinders down to others, could we lean out the average ones?? theoretically, yes

That would be awesome!!
What rpm was the 31*?