The best setup I've seen is to have the carbs all facing the same direction & run linkage between the banks. Sourcing that manifold may prove difficult. I run a center bell crank & it has uneven arms. Not perfect, but if you set it properly I performs well. Running the stock linkage that most provide in a kit is much worse. Do your vacuum readings just off idle & at about 2500 & you'll see how far out of whack things get.
