True, the th
True, the throttle cable will work best or easiest for the first carb, which in turn would operate the second one, with its mechanical linkage. I would think you would need a Heavy Duty cable. Dodge vans used solid rods for their carbs, pedal to carb (early to mid 70's). Their kick-downs were also solid. When I installed the 340, I had to do a little adjustment to connect the AVS, but kept the solid linkage. It worked great.
