Later today, I'll be putting back together, with fresh rebuild kit parts, another 1406 Edelbrock (Carter) carburetor... that will work better than what came new in the box. One of it's primary booster cluster flat plugs simply fell out while soaking in cleaning solution. Luckily I found the plug, because they aren't even obviously available for purchase to replace. Now, both primary and secondary plugs are cleaned up real good in the area and epoxied over so that none of them will ever loosen or fall out like that again. Those plugs loose (or fallen out) would lessen or entirely diminish the airflow signal to the booster to flow through the main circuit.