If I personally had a choice of installing a single 4bbl vs 2X2bbl. 2GC's, I would take the twin carb intake because of fuel distribution and in the design stage you have the option of turning them 90 degrees to help with linkage hook-up so a bellcrank isn't needed. A Unisyn can make the carb tuning a fairly easy task.
'45 Ford PU 66 Valiant wagon, leaning tower of power. 79 Chevy C10 w/250 02 PT Cruiser Convertable