Flare Wrench for Holley Inlets
Those Diner ketchup squeeze bottles make for good fuel bowl vent fillers. Invert, put in and squeeze. I think Holley had to make them that big to get the inverted flare the right size for the fuel flow they could take as a performance carb. Would not make the inverted flare in he zinc bowl itself, too soft. IIRC Some of the better AL ones are threaded for the bowl threads themselves, no wonky flare adapter.