Also, keep in mind, as manufactured, the single 4 lid has a divider cast into the bottom so the right side of the carb feeds the left side of the engine and vice versa. I'd bet a good percentage of the single 4 lids had those cut out, but I have both lids for my Ram Box (as well as the linkage for the dual 4), and my single 4 still has that divider.
Dave
Dave

