Here is my choice of an option. 2 Roach 2 barrels, second front) just dumps like the ends on a tripower. The dumper is progressivly linked to the rear as well. It runs on the (rear) 2 all day and have a lillte something when I downshift to 4th and pass. It is my version of the 4 barrel Holly 390 CFM but more old school with an emphisis on the More COOL!
Look at the link to fliker for a peak.
Cavebull
I am no expert but i have followed the ones around here pretty closely and am working on a 2G answer too. I can't help but think the gigantic manifold volume you have is going to make it miserable to gently accelerate. I'm curious what Jerry or Jon's take on your setup would be. Here's my 2 barrel answer so far:
http://good-times.webshots.com/photo/2880217280023244788bgSYZa