Wish you the best and totally encourage you in your efforts.....what you are suggesting will work brilliantly. Your down the road to avoiding a multiple carb solution, which is always the standard United States reponse to reliable, long term maintenace free horsepower generation. The dislike for balancing throttle linkages is the reason for going to a tunnel ram single carb.
I personally ditched further work on the single 2-bb or 4-bbl Holley carb 6PT intake adaptor I was working, not because it didn't work...I just found out what was the best way to make independent runner systems reliable and more powerfull with less effort. Again, the United States guys taught me that multiple throttle body induction could be blanaced via IAC and kept servicable from aftermarket worked versions on the CrossFire 82 and 84-86 Corvette and 305 F car versions of the twin CFI setups.
http://www.thirdgen.org/techboard/tbi/4 ... odies.html
I will never be going back to single carb options, you and I are at philosphical different postions, and I've spent 2 years of my own time looking at what your doing.
Since I know that the log head isn't a pinch point if its worked, cutting off the log is a bold move I won't be bothering with becasue there are easier ways. My 6VO and 6Ri adpators bolt to the log head, and make three carbs work reliably, and allow port EFI. Its personal, not a vote of no confidence in the idea's you have.
Powerband is where you at, your just doing the same thing in tube.
Some ideas follow which will help you on your way.
Powerband and I did discuss the idea of a 6-bbl intake on one log head, a sort of 6-bbl version of the EAO Lima 2300 efi turbo intake manifold. That could take one 2-bbl Holley. The 2305 eliminates the worst problem on the 2300 series carb...it has much better air fuel distribution, without biasing flow to any particular cylinders.
Seams to me you are simpliying it a step further, like building an upturned
Frenchtownflyer intake with just on Holley 2-bbl.
Like this, only down draft.
Seams like your halfway there, and you may not even need tubes
Plenty of times, a side draft version of the a tunnel ram concpet has been done.
More impressive than the triple DCOE 45 conversion to Datsun 24/26 and 28 Ounces is the 4-bbl 390 #8007 Holley adaptor to the stock engine that came with twin Hitachi SU intake manifolds.
There are two types, an Arizona Z fully cast 4-bbl and a more interseting stock Z car two SU adaptor to 4-bbl. Seams to me a nice 1:1 linkage 2305 or a good old 2300 500 cfm 2-bbl would work.
http://www.datsunclassifieds.com/auto-p ... -4071.html
http://forums.hybridz.org/topic/69355-4-barrel-intake/
http://arizonazcar.com/cars.html
http://arizonazcar.com/azcM2506.JPG
http://bringatrailer.com/2012/09/29/bat ... -race-car/